Four were killed and 16 injured Thursday during a parade in Midland, Texas.
The truck shortly before the accident:
Image by Reporter-Telegram, James Durbin / AP
The truck after the accident:
Image by Reporter-Telegram, Tim Fischer / AP
"The train honked its horn, but the 18-wheeler could not go anywhere because of the other one (truck) being right in front of it," parade attendee Daniel Quinonez told the Associated Press. "It was a horrible accident to watch happen right in front of me. I just saw the people on the semi-truck's trailer panic, and many started to jump off the trailer. But it was too late for many of them."
Image by Reporter-Telegram, Tim Fischer / AP