Time Travel in 1971

Time magazine covered the historic flight made in October of 1971 that proved Einstein’s notion of Time dilation, an effect of Einstein’s theory relativity, takes place during everyday activities

Abstract from Time article

To most of the passengers on Pan American Flight 106 from Washington’s  Dulles  International Airport, it was simply a routine trip to London.  But for  Physicist Joseph C. Hafele and his companion, Astronomer  Richard Keating, it  was the beginning of a journey into the most  esoteric realms of modern science.  Occupying four seats in the big  747’s tourist compartment—two for themselves  and two for their  scientific gear—they were setting off on an extraordinary  round-the-world odyssey: an expedition to test Albert Einstein’s  controversial  “clock paradox,” which, stated simply, implies that time  passes more…
Read more: http://www.time.com/time/magazine/article/0,9171,910115,00.html#ixzz21NYhWWVI