Adam David "Atom" Willard (born August 15, 1973) is an American drummer who has been a member of several notable musical acts. Willard's drumming career began in 1990 when he joined Rocket from the Crypt, with whom he remained until 2000. Subsequently, he joined The Special Goodness, The Offspring, and in 2005 became a founding member of Angels & Airwaves. In 2007 his departure from The Offspring was announced so Willard could focus on his work with Angels & Airwaves, and in April 2009 he also joined Social Distortion, but left the following March. In June 2011, he joined the band Danko Jones and in October 2011 he announced his amicable departure from Angels & Airwaves. He has been the drummer for Against Me! since 2013.