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  2. Time bomb - Wikipedia

    en.wikipedia.org/wiki/Time_bomb

    A time bomb (or a timebomb, time-bomb) is a bomb whose detonation is triggered by a timer. The use or attempted use of time bombs has been for various purposes including insurance fraud, terrorism, assassination, sabotage and warfare. They are a frequent plot device in thriller and action films as they offer a way of imparting a dramatic sense ...

  3. Timeline for the day of the September 11 attacks - Wikipedia

    en.wikipedia.org/wiki/Timeline_for_the_day_of...

    Flight paths of the four planes used on September 11. 7:59 a.m.: American Airlines Flight 11, a Boeing 767 with registration number N334AA, carrying 76 passengers (excluding the hijackers) and 11 crew members, departs 14 minutes late from Logan International Airport in Boston, bound for Los Angeles International Airport.

  4. Civil defense siren - Wikipedia

    en.wikipedia.org/wiki/Civil_defense_siren

    The outdoor sirens are tested four times a year on the first non-holiday Monday of March, June, September, and December at 15:00 local time. The test consists of the general alarm for 2 minutes, followed by a 90-second gap before the "all clear" is sounded. There are usually around 15 to 20 general alarms, occurring locally, per year.

  5. Ahmed Mohamed clock incident - Wikipedia

    en.wikipedia.org/wiki/Ahmed_Mohamed_clock_incident

    On September 14, 2015, 14-year-old Ahmed Mohamed was arrested at MacArthur High School in Irving, Texas, for bringing a disassembled digital clock to school. The incident ignited allegations of racial profiling and Islamophobia from many media sources and commentators. The episode arose when Mohamed reassembled the parts of a digital clock in ...

  6. Delay-action bomb - Wikipedia

    en.wikipedia.org/wiki/Delay-action_bomb

    Delay-action bomb. A delay-action bomb is an aerial bomb designed to explode some time after impact, with the bomb's fuzes set to delay the explosion for times ranging from very brief to several weeks. Short delays are used to allow the bomb to penetrate before exploding: "a delay action bomb striking the roof of a tall building will penetrate ...

  7. Pencil detonator - Wikipedia

    en.wikipedia.org/wiki/Pencil_detonator

    The briefcase bomb used in the July 20 plot used a captured British pencil detonator inserted into a block of British plastic explosives weighing approximately two pounds. The bomb was set to 30 minutes and detonated as planned, but Hitler survived with minor injuries. Stauffenberg could not prepare the second block, though. He got rid of it ...

  8. Atomic bombings of Hiroshima and Nagasaki - Wikipedia

    en.wikipedia.org/wiki/Atomic_bombings_of...

    Total killed (by end of 1945): 150,000–246,000. On 6 and 9 August 1945, the United States detonated two atomic bombs over the Japanese cities of Hiroshima and Nagasaki, respectively. The bombings killed between 150,000 and 246,000 people, most of whom were civilians, and remain the only use of nuclear weapons in an armed conflict.

  9. Tunguska event - Wikipedia

    en.wikipedia.org/wiki/Tunguska_event

    Date: 30 June 1908; 116 years ago (): Time: 07:17: Location: Podkamennaya Tunguska River, Yeniseysk Governorate, Russian Empire: Coordinates: 1]: Cause: Probable meteor air burst of small asteroid or comet: Outcome: Flattened 2,150 km 2 (830 sq mi) of forest Devastation to local plants and animals: Deaths: Up to 3 possible [2]: Property damage: A few damaged buildings: The Tunguska event was a ...