Killswitch Engage's North American tour in support of their latest album, Disarm the Descent, kicks off tomorrow, May 30, at the Diamond Ballroom in Oklahoma City, Oklahoma. The region was hit by a devastating tornado on May 20. Therefore, the band has decided to donate a portion of the proceeds from the evening's tickets sales to the Regional Food Bank of Oklahoma. Also, fans are encouraged to look for a special Killswitch Engage T-shirt, where 100 percent of the proceeds will be donated to the RFBO.