WATCH FULL VIDEO: https://www.youtube.com/watch?v=mqQIo-Aftpk A tragic mid-air collision between two helicopters that were assisting in firefighting efforts for a Southern California brush fire, left three people aboard one of the helicopters dead. Cal Fire says crews were battling a small brush fire Sunday in the community of Cabazon in Riverside County when their Skycrane helicopter – used to drop water and fire retardant – collided with a second Bell helicopter – a chopper that hovers above to observe and coordinate operations.