https://www.cnn.com/2019/06/10/us/helicopter-building-new-york/index.html ,
https://www.cnn.com/us/live-news/manhattan-helicopter-crash-june-2019/index.html ,
https://www.cbsnews.com/news/helicopter-crash-1-dead-as-helicopter-crashes-midtown-manhattan-building-at-787-7th-ave-today-2019-06-10-live-updates ,
https://en.wikipedia.org/wiki/AXA_Equitable_Center
urban crashes
