Six people were killed and a debris field stretched across an airport and a highway when two vintage World War II planes crashed at a Dallas air show.
The National Transportation Safety Board is leading the investigation into the cause of the tragedy at the Wings over Dallas air show.
Why were the two planes sharing the same space before the crash is one of the questions investigators are trying to answer.
Michael Graham, a member of the National Transportation Safety Board, said at a news conference that one of the things they would most likely be trying to determine is why those aircraft were co- altitude in the same air space at the same time.
The final report from the National Transportation Safety Board will take up to 18 months to complete.
Less than 10 miles from downtown, two planes collided in the air above Dallas Executive Airport. There were no injuries to people on the ground, according to the mayor.
There has been a terrible tragedy in our city. The videos are hard to watch. Say a prayer for the souls who took to the sky to entertain us.
A plane collides and crashes at an air show.
Two former members of the Allied Pilots Association are dead.
"Our hearts go out to their families, friends, and colleagues past and present, and counseling is available at our Fort Worth headquarters," the association said in a statement.
The video shows the P-63 turning into the path of the B17 The P-63 flew straight into the ground after the two planes broke apart. Black smoke comes from raging flames.
The B17 has a crew of four to five people and the P-63 has a single pilot.
The widow of legendary test pilot Chuck Yeager was at the event but did not see the crash.
I saw the fire after the crash. It decimated everyone. She said it was so sad. P 63 formed up. B 17 probably didn't know what happened. It takes a lot of practice to fly a formation.
The main component of U.S. air superiority in World War II was the B 17 bomber. After the war, many were scrapped. There have been 21 crashes since 1982 involving World War II-era bombers that resulted in 23 deaths, according to the National Transportation Safety Board.
During the war, the Kingcobra was used by the Soviets.
The Associated Press contributed to the story.
The Dallas air show crash killed six people.