This helps explain the front page of the New York Daily News that dashed right past the actual story of the shooter at the Washington Navy Yard in favor of trying to score a political point (talk about burying the lede):
I'm sure it looked really great to those who really wanted the victims to be slain with the bête noire of the anti-gun lobby, but unfortunately for them, there was no AR-15 used by Aaron Alexis (other than the one wielded by the officer who finally took him out). The story is in need of what we would term the Litella Defense (which is no defense at all), assuming that the NYDN actually had a defense.
It mumbled the usual claptrap about reliable sources being wrong, but all that really meant was that the paper didn't have the professional integrity to secure corroborating evidence before it ran the story. It took them two days to admit their negligence, giving the story a chance to gain a purchase among the low information voters that mull over such dross during their union bus ride to the voting polls.