ST PETERSBURG, RUSSIA - AUGUST 12, 2016: An ambulance helicopter pictured during an emergency response exercise at Sportivnaya Station of the St Petersburg Metro. Sergei Konkov/TASS (Photo by Sergei Konkov\TASS via Getty Images)
ST PETERSBURG, RUSSIA - AUGUST 12, 2016: An ambulance helicopter pictured during an emergency response exercise at Sportivnaya Station of the St Petersburg Metro. Sergei Konkov/TASS (Photo by Sergei Konkov\TASS via Getty Images)