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A time bomb's timing mechanism may be professionally manufactured either separately or as part of the device, or it may be improvised from an ordinary household timer such as a wind-up alarm clock, wrist watch, digital kitchen timer, or notebook computer. The timer can be programmed to count up or count down (usually the latter; as the bomb ...
CPG 1-17 recommends that a monthly test be conducted, consisting of the steady attention signal for no more than one minute, one minute of silence, and the attack signal for no more than one minute. A growl test signal is also described by CPG 1–17, when a siren must be tested more than once a month. This is typically a one-second burst of ...
These devices would detonate the bomb if it was moved in any way. Typically, the safety-arming device used was a clockwork Memopark timer, which armed the bomb up to 60 minutes after it was placed [92] by completing an electrical circuit supplying power to the anti-handling
Witnesses attested to hearing a loud blast and seeing smoke at the Capitol. [5] FBI officials determined that the bomb was a high-explosive device with delayed timing, consisting of sticks of dynamite with a pocket watch as a timer. [8] A group calling itself Armed Resistance Unit claimed responsibility for the bombing.
Most of the materials required can be easily obtained. The bomb can be triggered using a simple electronic device such as a digital watch, garage door opener, cell phone, pager, kitchen timer, or alarm clock. [1] [3] The power of the explosion depends on the size of the pressure cooker and the amount and type of explosives used. [4]
A stun grenade, also known as a flash grenade, flashbang, thunderflash, or sound bomb, [1] is a non-lethal explosive device used to temporarily disorient an enemy's senses. Upon detonation, a stun grenade produces a blinding flash of light and an extremely loud "bang".
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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 through several ...