CHIN UP A young visitor to the Cleveland National Air Show attempts the Navy Challenge pull-ups in Cleveland, Ohio, Sept. 5, 2010. The air show, which featured the U.S. Navy flight demonstration team, the Blue Angels, capped Cleveland Navy Week. Navy weeks are designed to show Americans the investment they have made in their Navy and increase awareness in cities that do not have a significant Navy presence. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 554945-Q-TVW40-808.jpg Photo Gallery