The co-pilot for American Airlines flight 738 this morning from Detroit to Philadephia was arrested on suspicion of being drunk.
The TSA reported that the co-pilot appeared inebriated while passing through the security checkpoint and police were called. The co-pilot failed a breathalyzer test and was arrested and then released after he had sobered up.
Apparently though the co-pilot made it on to the aircraft, because passengers reported watching him being removed from the plane.