ATLANTA — The organizer of a petition that sought to block public financing for a new Atlanta Falcons stadium said Thursday the effort has failed to gather enough signatures. William Perry of Common Cause Georgia said the group knew it was a longshot to gather 35,000 signatures in 60 days, qualifying for the November ballot. "As the clock runs out, it appears the 'Hail Mary' pass we threw in the air will not result in a touchdown," Perry said in an email.