Packing a hand grenade isn't a very good idea -- even if it's just a souvenir.
Authorities at Los Angeles International Airport say Stanford University professor Gary Walter Cox had a hand grenade in his carry-on bag last week.
The terminal was evacuated and the bomb squad destroyed the device.
Cox tells the LA Times it was a World War II-era souvenir his late father, a retired Navy captain, used as a paperweight. Cox says he forgot it was in his bag after cleaning his childhood home.
The poli-sci prof is now free on $500,000 bail.
Cox says police told him the charges would be dropped.