And there is a drama under way behind the scenes of the president's visit overseas. Secret service agents have been sent home after a drinking binge. Reporter: In this training video, the president's... See More
And there is a drama under way behind the scenes of the president's visit overseas. Secret service agents have been sent home after a drinking binge. Reporter: In this training video, the president's motorcade is attacked by armed men with shoulder fired missiles. The secret service's counter assault team responds with machine gun fire, a move critical to the president's escape in this training exercise. But today, that counter assault team, itself, is under fire because of an alleged drinking binge by three of its vaunted members sent to prepare for the president's visit to Europe. A night on the town that left one agent so drunk that he passed out in the hallway of his hotel. The director needs to fire them immediately. They have failed us. Reporter: The embarrassing incident comes two years after the Cartagena, Colombia, scandal where agents admitted to sleeping with prostitutes prior to the president's visit there. New guidelines on conduct were put in place and the secret service leadership vowed zero tolerance on "Frat boy" behavior. To make matters worse, the agents did this despite the fact that recently selected secret service director Julia Pierson was on the trip. I do believe there is a culture of knuckle-headedness. There is a culture of there is a culture of obnoxiousness. Reporter: Concern that they're damaging a hard-earned reputation. Tonight -- Osama bin laden's
This transcript has been automatically generated and may not be 100% accurate.