It used to be when America went on vacation, Mom and Dad packed up the station wagon, told the kids to shut up and drove off to an exciting, never-before-seen destination a whole state or two away. Peyton Manning just finished his vacation that included a USO Tour to Afghanistan, a $500,000 donation to the foundation of his college's former women's basketball coach, delivering speeches on leadership to several corporations and accepting awards in New Orleans and Kansas City, Mo. And he got in three days of passing with his new receiver Wes Welker and returning targets Demaryius Thomas and Eric Decker at Duke University. "I wouldn't call it a summer vacation," Manning said. Such is the jet-setting life of a star NFL quarterback — a star quarterback who happens to be employed by the Broncos for going on a second season. Manning and most of his Broncos teammates returned to work Monday for the start of the team's offseason conditioning program at the team's Dove Valley headquarters. The conditioning and strength-resistance work will continue until the additional organized team activities begin in late-May. There will be a mandatory minicamp in mid-June. Training camp will begin in late July. For Manning, the workouts are a welcome break from his offseason vacation. He and the Broncos last played Jan. 12, when they were upset 38-35 in double overtime in frigid conditions at home by the Baltimore Ravens.