(KCEN) -- We have an update on the train accident that killed four wounded veterans.
The float carrying those wounded vets crossed onto the tracks several seconds after warning signals sounded.
A timeline was pieced together using information from a video camera mounted on the front of the train, a sheriff's car and a data recorder.
The NTSB says the guardrail was lowering by the time the float hit the tracks.
Nine seconds before the crash, the train sounded it's horn.
The emergency brake was used but it wasn't enough time to stop the train traveling at 62 mph.
Hundreds gathered for a candlelight vigil to remember four veterans killed in the train crash Saturday evening.
Seventeen others were injured.