Flight-time experience can vary widely between military and commercial helicopter pilots, which can be a big factor in situational awareness.

The winter morning of Jan 20 in the mountainous town of Chewang located in southwest China Sichuan Province began for Yuan Tao the Party chief of ...

Ryan O’Hara, 28, from Lilburn, Georgia, and Chief Warrant Officer 2 Andrew Loyd Eaves, 39, from Great Mills, Maryland, died in the crash. Eaves was the instructor pilot on board and had about 1,000 ...

Flight recorder 'black box' from army Black Hawk helicopter recovered from wreckage - None of the 67 passengers and crew are believed to have survived ...

加密货币是一种数字形态的货币。他们属于数字资产，可用于购买商品和服务。加密货币也可储存价值、记账和作为交换中介。分布式账本(又称“区块链”)保障了这种数字资产的安全。第一个加密货币是比特币，中本聪(假名)创造了这种加密货币，并在2009年 ...