Travel office closed Jan. 17 Published Jan. 10, 2011 CANNON AIR FORCE BASE, N.M. -- Potomac Falls Travel will be closed Jan. 17 in observance of a federal holiday, the birthday of Martin Luther King Jr. Individuals traveling Jan. 14-18, must pick up their airline tickets no later than Jan. 13. For assistance after hours, call 1-800-867-4510.