Countdown to Moon Landing Golden Anniversary

July 20, 2018, marked the beginning of the countdown to the 50th anniversary of man's first steps onto the moon. To better understand where man might step 50 years from now, VOA Contributor Greta Van Susteren went to the Udvar-Hazy National Air and Space Museum to talk with Smithsonian Space Historian Valerie Neal about what America's space past can tell us about America's space future.