Emergency crews survey damage on a rooftop of a building after a helicopter crash in New York City, New York, U.S., June 10, 2019. Helicopter crash into Manhattan building kills pilot, draws NYC into high alert with reaction from mayor and building workers. New York City Fire Department/Handout via REUTERS

Emergency vehicles are seen outside 787 7th Avenue in midtown Manhattan where a helicopter crashed in New York City, New York, U.S., June 10, 2019. Only one person was aboard the aircraft when it crashed on the roof of 787 Seventh Avenue at 51st Street at 1:43 p.m, city officials said. REUTERS/Mike Segar

Emergency vehicles fill the street at the scene after a helicopter crashed atop a building in Times Square and caused a fire in the Manhattan borough of New York, New York, U.S., June 10, 2019. A helicopter crashed onto the rooftop of a 51-story building in Midtown Manhattan. REUTERS/Brendan McDermid

New York City Fire Department trucks and first responders are seen outside 787 7th Avenue in midtown Manhattan where a helicopter was reported to have crashed in New York City, New York, U.S., June 10, 2019. REUTERS/Brendan McDermid

New York City police and firefighters arrive at the scene after a helicopter crashed atop a building in Times Square and caused a fire on the roof in the Manhattan borough of New York, New York, U.S., June 10, 2019. REUTERS/Brendan McDermid