The documentary *The Lonely Halls Meeting: A GPS Documentary* argues that GPS was invented during a Labor Day 1973 Pentagon meeting led by Dr. Bradford Parkinson, with help from 12 others. It traces G
Transit 5B-5, a U.S. Navy navigation satellite launched on December 28, 1964, remains in orbit, still transmitting, and still detectable by amateur radio operators more than 60 years later. It was par