"Don't believe in God?" a bright blue billboard with images of puffy white clouds asks. "You are not alone."The 20-by-60-foot sign alongside I-95 was designed by a group of area atheists as an invitation to join the Greater Philadelphia Coalition of Reason, or PhillyCoR, the Philadelphia Inquirer reports."If you don't ... [h]undreds of thousands of your neighbors in the Delaware Valley feel the same as you do," the organization's website declares.Steve Rade, president of Wireless Accessories, Inc., gave the $22,500 to fund the billboard May 1, and he plans to keep it there until the end of August."Our mission is...