The siren sounded through the concrete tunnels at Dahlgren - a secret base of the US Navy, where engineers and US military officials were preparing to test a new super weapon.
The Russian defense industry is developing new devices that are more powerful than nuclear bombs.
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According to the Times of Israel, the Turkish Army has successfully tested its electromagnetic weapons that can fire bullets faster than US similar weapons.
The US military has successfully tested a new dangerous super weapon, which can fire artillery shells at 7 times the speed of sound.
The explosive grenades emitting powerful electromagnetic pulse bursts are the favors of fictional writers and computer game designers.