Staff sergeant takes next 'STEP' in career Published Dec. 19, 2014 By Staff Reports 90th Missile Wing Public Affairs F.E. WARREN AIR FORCE BASE, Wyo. -- Effective today, Staff Sgt. Peter Pleasanton, 90th Missile Maintenance Squadron, was promoted to the rank of technical sergeant through the Stripes for Exceptional Performers Program. STEP is an incentive program that immediately promotes outstanding senior airmen, staff and technical sergeants and is based on the Airman's professional accomplishments and recommendations from their commander.