When a reporter revealed classified information, the source of the 'leak' was investigated.
One of the car's tires has a 'slow leak'. [=a small hole through which air escapes slowly]
Security is high because of a fear of 'leaks' before negotiations have been finished.
(..) - Where's Queenan? - He's not here. They knew you had cameras in the building. They knew everything. There is a leak from the inside. It's real. Man, smoke him out. Yeah, how do we do that, Mr. Genius-Who- Didn't-Even-Graduate-From-the-Academy? Disinform. Let it slip to SIU that you have (..)2006 The Departed
(..) ...we are going to get him. Let's go to work. All right, you guys find out what we're doing and get on it. Sorry to get you last-minute, but things leak. This lead came from Queenan's undercover guy. I'm gonna smoke. You don't smoke? One of those fitness freaks, huh? Go fuck yourself. - Hi, Dad? (..)2006 The Departed