Any fan of the space program should recognize quite a few faces roaming around D.C. this week. Last night, the biggest gathering of Apollo astronauts in years arrived at the Smithsonian’s National Air & Space Museum for the annual John H. Glenn Lecture featuring the Apollo 11 crew, Neil Armstrong, Buzz Aldrin, and Michael Collins, along with NASA’s first Flight Director, Chris Kraft, and of course, astronaut and Senator John Glenn himself. The audience was…