bomb threat

letter bomb (parcel bomb, mail bomb, postal bomb etc)

aerial photoflash bomb / photoflash bomb / flash bomb

inflight bomb threat

atomic bomb (A-bomb)

electromagnetic bomb (e-bomb)

fusion bomb (thermonuclear bomb)

thermobaric bomb (aerosol / vacuum bomb, fuel air explosive [FAE])

airborne threat

asymmetric threat

atomic threat

constitute a threat

counter a threat

credible threat

damage threat

direct military threat

direct threat of aggression

external military threat

external threat

high threat personnel

imminent threat

in-flight security threat

information security threat

internal threat

low-threat environment

military threat

non-traditional threat to security

period of threat

remote threat

Security Threat Information (STI)

surface threat

Terrorist Threat Intelligence Unit (TTIU, NATO)

terrorist threat level