
        White House Press Secretary Jay Carney listens during the daily press briefing at the James S. Brady Press Briefing Room of the White House September 8, 2011 in Washington, DC. (Alex Wong/Getty Images North America)
    

...Just don't ask me how often or why there is no documented proof of it.
The notion of Barack Obama firing a rifle is so absurd, Carney even giggles at the mere mention of it:
TheBlaze has uncovered this, the only known photograph in existence of Barack Obama at Camp David actually holding a gun:
And this, the only photograph you'll ever see of Obama actually "shooting" something: