Rescuers work on the scene of a school bus crash in November 2016 in Chattanooga, Tenn. School bus driver Johnthony Walker was convicted Thursday of negligent homicide and other charges in the crash, which killed six children.
Chattanooga Fire Department/Reuters
Mexican police officers stand guard near the tour bus that overturned Tuesday morning in Quintana Roo state. Twelve people were killed, including 8 Americans.
Maneul Jesus Ortega Canche/AFP/Getty Images
In this aerial image taken from video footage Wednesday, authorities respond to a deadly crash involving a pickup truck and a bus filled with church members on U.S. 83 outside Garner State Park in northern Uvalde County, Texas.
Courtesy KABB/WOAI via AP
Gonaives, a city in northern Haiti, is seen in May 2016. On Sunday morning, a bus crashed into a parade in the city, killing at least 34 people and injuring 17.
Hector Retamal/AFP/Getty Images
The remains of a FedEx truck (right) and a bus involved in a crash Thursday are taken from the scene of the accident in Orland, Calif., by flatbed trucks on Friday. The students had been on their way to visit Humboldt State University in Northern California.
Elijah Nouvelage /Getty Images
Flames devoured both vehicles just after a FedEx truck hit a charter bus Thursday in Northern California. At least 10 people were killed. The bus was carrying high school students who were going to visit a college.