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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. Ahmed Mohamed clock incident - Wikipedia

    en.wikipedia.org/wiki/Ahmed_Mohamed_clock_incident

    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 ...

  4. Doomsday Clock - Wikipedia

    en.wikipedia.org/wiki/Doomsday_Clock

    Doomsday Clock. The Doomsday Clock is a symbol that represents the likelihood of a human-made global catastrophe, in the opinion of the members of the Bulletin of the Atomic Scientists. [1] Maintained since 1947, the Clock is a metaphor, not a prediction, for threats to humanity from unchecked scientific and technological advances.

  5. Georg Elser - Wikipedia

    en.wikipedia.org/wiki/Georg_Elser

    Hitler ended his address to the 3000-strong audience of the party faithful at 9:07 p.m., 13 minutes before Elser's bomb exploded at 9:20 p.m. By that time, Hitler and his entourage had left the Bürgerbräukeller. The bomb brought down part of the ceiling and roof and caused the gallery and an external wall to collapse, leaving a mountain of ...

  6. Improvised explosive device - Wikipedia

    en.wikipedia.org/wiki/Improvised_explosive_device

    v. t. e. 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.

  7. Nuclear clock - Wikipedia

    en.wikipedia.org/wiki/Nuclear_clock

    time-keeping. A nuclear clock or nuclear optical clock is a atomic clock being developed that will use the energy of a nuclear isomeric transition as its reference frequency, [1] instead of the atomic electron transition energy used by conventional atomic clocks. Such a clock is expected to be more accurate than the best current atomic clocks ...

  8. Four-minute warning - Wikipedia

    en.wikipedia.org/wiki/Four-minute_warning

    The four-minute warning was a central plot and narrative device in dramas (both on stage and screen) and novels, often being the motor force of plays, films, novels and cartoon strips. The BBC drama Threads, about how society decays after a nuclear holocaust, focuses on an attack on Sheffield. The War Game also portrays the four-minute warning ...

  9. Pencil detonator - Wikipedia

    en.wikipedia.org/wiki/Pencil_detonator

    Pencil detonator. A pencil detonator or time pencil is a time fuze designed to be connected to a detonator or short length of safety fuse. They are about the same size and shape as a pencil, hence the name. They were introduced during World War II and developed at Aston House, Hertfordshire, UK.