More than two million people attended a free Lady Gaga concert at the iconic Copacabana beach in Rio de Janeiro on Saturday, May 3, according to city officials. A diver on an expedition off the coast ...

The F-18 HARV or High Alpha Research Vehicle was a NASA testbed used to study performance at high angles of attack or alpha. The aircraft flew from 1989 to 1996 in a 3 phased research program that ...