The unmanned Antares rocket carrying the unmanned Cygnus spacecraft exploded during launch at NASA's Wallops Flight Facility in Wallops Island, Virginia, Tuesday evening.
The launch was scheduled for 6:22 p.m. ET. The spacecraft was carrying 5,000 pounds of supplies to the International Space Station.
The launch was originally scheduled for Monday, but was scrapped when a boat wandered into the hazard area.