“There were 1,549 firearms discovered at TSA checkpoints nationwide in 2012. TSA has found 10 guns at Memphis International Airport this year and six at McGhee Tyson. Weapons — included guns — are not permitted in carry-on baggage. Passengers are responsible for the contents of bags they bring to the security checkpoint. Passengers who bring firearms to a checkpoint face a civil penalty from TSA, which last year assessed more than $1.8 million in civil penalties for firearms discovered in passenger carry-on bags.”
formerly/http://www.knoxnews.com/news/2013/may/15/tsa-finds-loaded-pistol-in-carry-on-luggage-at/