At least one police officer died after two helicopters collided at Berlin's iconic Olympic Stadium during a security exercise, authorities said. -- Agence France-Presse
Helicopters crash near Berlin's Olympic Stadium
Catch up with NBC News Clone on today's hot topic: Helicopters Crash Near Berlins Olympic Stadium Flna1c8995667 - Breaking News | NBC News Clone. Our editorial team reformatted this story for clarity and speed.
