A preauthorization is not a guarantee of benefits or payment. Predetermination. is a voluntary, written request for review of. treatment or services and includes services that may be considered. not medically necessary; investigational, experimental or unproven; or.
The Mercury Project suffered some early setbacks, however, and on April 12, 1961, Soviet cosmonaut Yuri Gagarin orbited Earth in the worldâs first manned space flight. Less than one month later, on May 5, astronaut Alan Shepard was successfully launched into space on a suborbital flight. On February 20, 1962, in a major step for the U.S. space program, John Glenn became the first American to orbit Earth.
Glenn checks over notes with backup pilot Scott Carpenter after a simulated flight in 1962, prior to the Mercury-Atlas 6 mission at Cape Canaveral. The object of the mission was to put the first American spaceman into orbit around the Earth.