ABC News' Lisa Stark and Sunlen Miller report: The plane carrying Sen. Barack Obama struck another plane while taxiing at Midway Airport in Chicago early Saturday morning.
At 2:45 a.m. Central Time, the Gulfstream 2 plane that carried Obama, nine other passengers and two crew members struck a parked Cessna 208 general aviation plane, which can carry 10 to 12 passengers.
There was minor damage to the wings of both aircraft, although no one on either of the planes was injured.
Inside Obama's plane, the hit was so small that no one realized they had clipped the other plane's wing until someone on the plane, looking out the window, noticed the swipe.
The plane, because it was taxiing and heading to park, was not under the control of air traffic controllers at that point.
Members of Obama's campaign staff, Secret Service members and two crew members were flying along with the senator.
Before leaving his Las Vegas event that evening, Obama commented that he only had one hour to speak to the crowd, so his pilot wouldn't get "cut off" and so he wouldn't get in trouble with his wife. Obama will be in Chicago today, enjoying a prescheduled day off with his family.