On May 22, 2011, the US Navy Flight Demonstration Squadron was performing at Lynchburg Regional Air Show, Va, when the diamond formation went too low at the end of the “Barrel Roll Break” maneuver. As ...
The North China Plain (NCP), one of the world's most polluted regions, is frequently engulfed by severe haze in the cold season, which has aroused broad public concern because of the adverse impacts ...
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