One of the astronauts who flew during the lunar program has died. Al Worden, 88, was a command module pilot who circled the moon during Apollo 15. His family announced the news on Twitter and NASA Administrator Jim Bridenstine said, "NASA sends its condolences to the family and loved ones of Apollo astronaut Al Worden, an astronaut whose achievements in space and on Earth will not be forgotten." Apollo 15 was considered one of NASA's most important scientific missions. But after the crew returned, they got in trouble for selling mementos they took to the moon. Al Worden grew up...