Lawyers for accused Army whistleblower Bradley Manning have opened their defense at his military court-martial. On Monday, Manning’s attorneys began by playing the video he leaked of U.S. forces shooting dead Iraqi civilians from a helicopter in 2007. The prosecution had sought to block the video from airing in court, calling it “not relevant.” Lawyers also submitted a transcript published in the book “The Good Soldiers” to show that the video had already been circulated before Manning made it public. Manning’s defense also asked the court to drop a number of charges, including aiding the enemy.