A DEA agent and a naval intelligence officer find themselves on the run after a botched attempt to infiltrate a drug cartel. While fleeing, they learn the secret of their shaky alliance: Neither knew that the other was an undercover agent.
 
http://www.imdb.com/title/tt1272878/

Genre: Action | Comedy | Crime
IMDb Rating: 7.0/10 from 3,908 users
Directed by: Baltasar Kormákur
Starring: Denzel Washington, Mark Wahlberg, Paula Patton

Note: There is a watermark that shows up every now and then throughout the movie; missing start.