airport
authority
bomb
bulgaria
crime
criminal
customs
customs officer
d e a
danger
dea
demonstration
detect
detection
dog
drug
drugs
drugs detection
duty
excise
expertise
find drugs
guard
law
luggage
men
military
narcotic
officer
participating
people
police
protection
protector
safety
search
searching
security
seeking
smelling
smuggle
sniff
sniffer
system
team
terrorism
training
uniform
weapons