The aerial acrobatics have begun at the Chicago Air & Water Show.
Members of the U.S. Navy's parachute team, the Leap Frogs, began the event by hurling themselves from aircraft at 12,500 feet. During their free fall descent, the jumpers can hit speeds of 180 mph by putting their arms tight to their sides before pulling their chutes. One of the jumpers was towing a giant American flag.
They were followed Saturday by the U.S. Army's parachute team, the Golden Knights.
The two days of shows along the city's Lake Michigan shorefront were expected to draw millions of visitors.
Each day will be capped by a performance by the U.S. Navy's Blue Angels, tearing across the sky in their blue and gold F/A-18 Hornets.