Since airport security tightened after 9-11, most officials are on highest alert for explosives and signs of terrorism.
But that doesn't mean they're turning blind eyes to illegal drugs, especially 81 pounds worth, which caught the attention of Transportation Security Administration screeners Friday.
CNN reports that a 26-year-old woman was arrested at Oakland International Airport after the TSA allegedly discovered marijuana in her three checked bags. The Jackson, Mississippi, resident was attempting to fly from Oakland to Jackson, Mississippi, via Phoenix and Dallas.
The TSA screens every bag placed on an airplane, whether taken as carry-on or checked with an airline," said TSA spokesman Ross Feinstein.
If officers find something that's probably a crime, they refer it to local authorities, who can decide whether to arrest and prosecute travelers.
"As is common practice, TSA notified the Alameda County Sheriff's Office of the discovery, who responded and took possession of the marijuana," said Feinstein. "The passenger was subsequently arrested on criminal charges."
According to the TSA, some 1.8 million passengers pass through U.S. airports every day. Click here for a detailed list of what items are prohibited from being carried on or checked.