The National Transportation Safety Board said it is reviewing additional videos showing the collision between a Pennsylvania State Police Bell 407 helicopter and a Cessna 150 airplane.
Investigators have revealed the cause of a plane crash that killed a Chester County school board president two years ago.
A new report from federal investigators casts blame on pilot and the plane's weight.
Retired NASCAR driver Greg Biffle was not flying his own jet when it crashed last month.
What could have been a major disaster was averted with just seconds to spare at a busy U.S. airport.
The NTSB has released its preliminary report into last month's nursing home explosion in Bristol, Bucks County, that left three people dead.