英文關鍵字
accident
air
airfield
alarm
alert
army
attack
base
battleship
bunker
closeup
command
control
damage
dark
defense
disaster
emergency
evacuation
facility
fire
flashes
flashing
government
invasion
lab
light
military
missile
nato
navy
night
norad
prison
raid
road
room
science
scientific
ship
soldiers
sound
submarine
system
traffic
underground
war
warning
ww3
yellow