On 21 March 2013, two helicopters of the German Federal Police collided while landing in front of Berlin Olympic Stadium, Germany, in whiteout conditions.

[1] The final investigation report describes the event as follows: The first aircraft, an EC 155, landed successfully around 10:28 CET but raised large amounts of snow from the ground.

It was followed by the Super Puma, which approached the landing zone at a steep angle and hovered back and forth above the ground for about 30 seconds, raising ever more snow that fully engulfed the first helicopter.

During this manoeuvre, the third helicopter, also a Super Puma, approached the landing zone, carrying the pilot, an engineer, and 13 officers.

Delegates of Alliance '90/The Greens and The Left questioned the use of helicopters during the bad weather conditions on the day of the exercise, and called the training scenario "unrealistic" and "disproportionate".

[5] Members of the Federal Police and politicians of the SPD and CDU stated that such exercises were useful, since real missions still have to be carried out in bad weather.

[8] Wolfgang Bosbach, head of the interior commission of the parliament of Germany, announced that the helicopter crash would be added to the list of subjects in a planned debate about the future structure of the federal police forces.

The investigators stated that all pilots had ample flying experience including landings in snow, dust and sand.

[15] Following the crash, the federal police introduced special training units and new rules for helicopter landings in snow.

[16] In February 2017, it was reported that NATO was prompted by the 2013 Olympiastadion crash to initiate a multinational trials campaign for new technologies in low-visibility helicopter flights.