Which debut album has sold over half a million copies in the United States and is by an American alternative rock band that released its first digital debut EP on May 2010 of a different album?
Back from Earth: Back from Earth is the debut EP by American alternative rock band Awolnation. Back from Earth:  It was released digitally by Red Bull Records on May 18, 2010 for iTunes. " Back from Earth: Sail", "Burn It Down" and "Guilty Filthy Soul" appear on "Megalithic Symphony", the band's debut album.
i don't know