On Second Thought for Friday, July 19, 2019

Every day, millions of Americans use -and often rely on- GPS technology to help them navigate their commutes and get precise directions to their destinations. As Americans celebrate the upcoming 50th anniversary of the Apollo 11 moon landing, they can thank the work of a Princeton University graduate, Todd Jaegar, who conceived and developed the Apollo 11 experiment that enabled GPS technology to take a “giant leap” forward. Meet a hidden figure named Vicky Graves, who worked for NACA, the predecessor to NASA.