Apparently when military leaders get together they joke about ... bombing countries. That's what Defense Secretary Robert Gates and Afghanistan coalition forces commander David Petraeus did when they met in Kabul yesterday. "Welcome back, Sir," Petraeus said to Gates on the tarmac after the boss landed. "You returning to normal, you gonna launch some attacks on Libya or something?" Petraeus quipped loudly enough for ABC News microphones to pick up. "Yeah, exactly," Gates deadpanned. Gates is meeting with troops and Afghanistan leaders during his 13th trip to the nation.