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Hexamethylene Triperoxide Diamine
Hexamethylene triperoxide diamine (HMTD) is a high explosive organic compound. HMTD is an organic peroxide, a heterocyclic compound with a cage-like structure. It is a Explosive material, primary explosive. It has been considered as an initiating explosive for Detonator, blasting caps in the early part of 20th century, mostly because of its high initiating power (higher than that of Mercury(II) fulminate, mercury fulminate) and its inexpensive production. As such, it was quickly taken up as a primary explosive in mining applications. However, it has since been superseded by more (chemically) stable compounds such as dextrinated Lead(II) azide, lead azide and DDNP (which contains no lead or mercury). HMTD is widely used in amateur-made blasting caps. Preparation and structure First synthesised in 1885 by the German chemist Ludwig Legler, HMTD may be prepared by the reaction of an aqueous solution of hydrogen peroxide and hexamine in the presence of an acid catalyst, such as citric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metre Per Second
The metre per second is the unit of both speed (a scalar (physics), scalar quantity) and velocity (a Vector (mathematics and physics), vector quantity, which has direction and magnitude) in the International System of Units (SI), equal to the speed of a body covering a distance of one metre in a time of one second. The International System of Units, SI unit symbols are m/s, m·s−1, m s−1, or . Sometimes it is abbreviated as "mps". Conversions is equivalent to: : = 3.6 kilometres per hour, km/h (exactly) : ≈ 3.2808 feet per second (approximately) : ≈ 2.2369 miles per hour (approximately) : ≈ 1.9438 knot (unit), knots (approximately) 1 feet per second, foot per second = (exactly) 1 miles per hour, mile per hour = (exactly) 1 kilometres per hour, km/h = (exactly) Relation to other measures The benz, named in honour of Karl Benz, has been proposed as a name for one metre per second. Although it has seen some support as a practical unit, primarily from German ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Detonation
Detonation () is a type of combustion involving a supersonic exothermic front accelerating through a medium that eventually drives a shock front propagating directly in front of it. Detonations propagate supersonically through shock waves with speeds in the range of 1 km/sec and differ from deflagrations which have subsonic flame speeds in the range of 1 m/sec. Detonations occur in both conventional solid and liquid explosives, as well as in reactive gases. The velocity of detonation in solid and liquid explosives is much higher than that in gaseous ones, which allows the wave system to be observed with greater detail (higher resolution). A very wide variety of fuels may occur as gases (e.g. hydrogen), droplet fogs, or dust suspensions. In addition to dioxygen, oxidants can include halogen compounds, ozone, hydrogen peroxide and oxides of nitrogen. Gaseous detonations are often associated with a mixture of fuel and oxidant in a composition somewhat below conventional flammabil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Explosive Chemicals
An explosive (or explosive material) is a reactive substance that contains a great amount of potential energy that can produce an explosion if released suddenly, usually accompanied by the production of light, heat, sound, and pressure. An explosive charge is a measured quantity of explosive material, which may either be composed solely of one ingredient or be a mixture containing at least two substances. The potential energy stored in an explosive material may, for example, be * chemical energy, such as nitroglycerin or grain dust * pressurized gas, such as a gas cylinder, aerosol can, or BLEVE * nuclear energy, such as in the fissile isotopes uranium-235 and plutonium-239 Explosive materials may be categorized by the speed at which they expand. Materials that detonate (the front of the chemical reaction moves faster through the material than the speed of sound) are said to be "high explosives" and materials that deflagrate are said to be "low explosives". Explosives may al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Organic Peroxides
In organic chemistry, organic peroxides are organic compounds containing the peroxide functional group (). If the R′ is hydrogen, the compounds are called hydroperoxides, which are discussed in that article. The O−O bond of peroxides easily breaks, producing free radicals of the form (the dot represents an unpaired electron). Thus, organic peroxides are useful as initiators for some types of polymerisation, such as the epoxy resins used in glass-reinforced plastics. MEKP and benzoyl peroxide are commonly used for this purpose. However, the same property also means that organic peroxides can explosively combust. Organic peroxides, like their inorganic counterparts, are often powerful bleaching agents. Types of organic peroxides Tert-Butyl hydroperoxide Structural Formula V2.svg, ''tert''-Butyl hydroperoxide, a hydroperoxide (formula: ROOH) that is used to epoxide alkenes. Dicumyl peroxide.svg, Dicumyl peroxide, a dialkyl peroxide (formula: ROOR) that is used to initiate po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frontline (American TV Program)
''Frontline'' (stylized as FRONTLINE) is an investigative documentary program distributed by the Public Broadcasting Service (PBS) in the United States. Episodes are produced at WGBH in Boston, Massachusetts. The series has covered a variety of domestic and international issues, including terrorism, elections, environmental disasters, and other sociopolitical issues. Since its debut in 1983, ''Frontline'' has aired in the U.S. for 39 seasons, and has won critical acclaim and awards in broadcast journalism. It has produced over 750 documentaries from both in-house and independent filmmakers, 200 of which are available online. Format The program debuted in 1983, with NBC anchorwoman Jessica Savitch as the show's first host, but Savitch died later after the first-season finale. ''PBS NewsHour''s Judy Woodruff took over as host in 1984, and hosted the program for five years, combining her job with a sub-anchor place on ''The MacNeil-Lehrer NewsHour'' when Jim Lehrer was away. In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ProPublica
ProPublica (), legally Pro Publica, Inc., is a nonprofit organization based in New York City. In 2010, it became the first online news source to win a Pulitzer Prize, for a piece written by one of its journalists''The Guardian'', April 13, 2010Pulitzer progress for non-profit newsProPublicaPulitzer Prize in Investigative Reporting: Deadly Choices at Memorial and published in ''The New York Times Magazine''Sheri Fink, '' New York Times Magazine'', August 25, 2009The Deadly Choices at Memorial as well as on ProPublica.org.ProPublica, August 27, 2009The Deadly Choices at Memorial ProPublica states that its investigations are conducted by its staff of full-time investigative reporters, and the resulting stories are distributed to news partners for publication or broadcast. In some cases, reporters from both ProPublica and its partners work together on a story. ProPublica has partnered with more than 90 different news organizations, and it has won six Pulitzer Prizes. History ProPub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atomwaffen Division
The Atomwaffen Division (''Atomwaffen'' meaning "nuclear weapons" in German), also known as the National Socialist Resistance Front, is an international far right-wing extremist and neo-Nazi terrorist network. Formed in 2013 and based in the Southern United States, it has since expanded across the United States and into the United Kingdom, Canada, Germany, the Baltic states, and other European countries. The group is described as a part of the alt-right by some journalists, but it rejects the label and it is considered extreme even within that movement. It is listed as a hate group by the Southern Poverty Law Center (SPLC), and it is also designated as a terrorist group by multiple governments, including the United Kingdom and Canada. Members of the Atomwaffen Division have been held responsible for a number of murders, planned terrorist attacks, and other criminal actions. History In 2015, the group's creation was announced by founding member Brandon Russell, on the N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neo-Nazi
Neo-Nazism comprises the post–World War II militant, social, and political movements that seek to revive and reinstate Nazism, Nazi ideology. Neo-Nazis employ their ideology to promote hatred and Supremacism#Racial, racial supremacy (often white supremacy), attack racial and ethnic minorities (often antisemitism and Islamophobia), and in some cases to create a fascist state. Neo-Nazism is a global phenomenon, with organized representation in many countries and international networks. It borrows elements from Nazi doctrine, including antisemitism, ultranationalism, racism, xenophobia, ableism, homophobia, anti-communism, and creating a "Fourth Reich". Holocaust denial is common in neo-Nazi circles. Neo-Nazis regularly display Nazi symbolism, Nazi symbols and express admiration for Adolf Hitler and other Nazi leaders. In some European and Latin American countries, laws prohibit the expression of pro-Nazi, racist, antisemitic, or homophobic views. Many Nazi-related symbols a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2016 New York And New Jersey Bombings
On September 17–19, 2016, three bombs exploded and several unexploded ones were found in the New York metropolitan area. The bombings left 31 people wounded, but no fatalities or life-threatening injuries were reported. On the morning of September 17, a pipe bomb exploded in Seaside Park, New Jersey. Later that day, a homemade pressure cooker bomb went off in the Chelsea neighborhood of Manhattan, New York City. A second pressure cooker bomb was discovered four blocks away. Late on September 18, multiple bombs were discovered at the train station in Elizabeth, New Jersey. One of these bombs detonated early the next day. On September 19, 2016, the sole suspect—Ahmad Khan Rahimi, of Elizabeth—was captured, following a shootout with police in neighboring Linden, New Jersey, which left three officers injured. Rahimi was not part of a terrorist group, but his actions were believed to have been influenced by the extremist Islamic ideology espoused by al-Qaeda. In 2017, Rahim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2000 Millennium Attack Plots
A series of Islamist terrorist attacks linked to al-Qaeda were planned to occur on or near January 1, 2000, in the context of millennium celebrations, including bombing plots against four tourist sites in Jordan, the Los Angeles International Airport (LAX) and and the hijacking of Indian Airlines Flight 814.Planned Jan. 2000 Attacks Failed or Were Thwarted; Plot Targeted U.S., Jordan, American Warship, Official Says , |
Suicide Bombing
A suicide attack is any violent attack, usually entailing the attacker detonating an explosive, where the attacker has accepted their own death as a direct result of the attacking method used. Suicide attacks have occurred throughout history, often as part of a military campaign (as with the Japanese ''kamikaze'' pilots of 1944–1945 during World War II), and more recently as part of terrorist campaigns (such as the September 11 attacks in 2001). While few, if any, successful suicide attacks took place anywhere in the world from 1945 until 1980, between 1981 and September 2015 a total of 4,814 suicide attacks occurred in over 40 countries, killing over 45,000 people. During this time the global rate of such attacks grew from an average of three a year in the 1980s to about one a month in the 1990s to almost one a week from 2001 to 2003 to approximately one a day from 2003 to 2015. Suicide attacks tend to be more deadly and destructive than other terror attacks because t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Improvised Explosive Device
An improvised explosive device (IED) is a bomb constructed and deployed in ways other than in conventional military action. It may be constructed of conventional military explosives, such as an artillery shell, attached to a detonating mechanism. IEDs are commonly used as roadside bombs, or homemade bombs. IEDs are generally done in these terrorism operations or in asymmetric unconventional warfare by insurgent guerrillas or commando forces in a theatre of operations. In the Iraq War (2003–2011), insurgents used IEDs extensively against U.S.-led forces and, by the end of 2007, IEDs were responsible for approximately 63% of coalition deaths in Iraq. They were also used in Afghanistan by insurgent groups, and caused over 66% of coalition casualties in the 2001–2021 Afghanistan War. IEDs were also used frequently by the Liberation Tigers of Tamil Eelam (LTTE) in Sri Lanka during the Sri Lankan Civil War. Background An IED is a bomb fabricated in an improvised manner ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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