Former United States Senator John H. Glenn, Jr., left, shakes hands with NASA Administrator Sean O''Keefe February 20, 2002 at NASA headquarters in Washington, DC. Glenn stopped by NASA to commemorate the 40th anniversary of his historic Project Mercury orbital flight. On February 20, 1962, Glenn became the first American to orbit the Earth, hurtling around the globe three times in a flight that lasted nearly five hours..Mandatory Credit: Bill Ingalls / NASA via CNP
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