Warner Bros. dropped the first trailer for Clint Eastwood’s “American Sniper” on Thursday, and it’s a doozy: The two-minute clip focuses on Chris Kyle, the most lethal sniper in United States history, and provides a brief window into what kind of decisions he was asked to make during his time as a Navy SEAL. Bradley Cooper plays Kyle in Eastwood’s film, and from the extra bulk on Cooper’s frame to the Texas accent he affects, it’s the kind of part that could put the two-time Oscar nominee in line for a third straight nod. Either way, keep “American Sniper” on your long list of Oscar contenders for one simple reason: Eastwood’s “Million Dollar Baby,” which had a similar “surprise” release in 2004 and went on to win Best Picture.