WASHINGTON - JULY 20: (L-R) Astronauts, David Scott, Apollo 9 and Apollo 15, Buzz Aldrin, Apollo 11, Charles Duke, Apollo 16, Thomas Stafford, Apollo 10 and Eugene Cernan, Apollo 10 and Apollo 17, participate in a news conference at NASA Headquarters on July 20, 2009 in Washington, DC. Today marks the fortieth anniversary of the first moon landing and moon on walk by astronauts Neil Armstrong and Buzz Aldrin which took place on July 20, 1969. (Photo by Mark Wilson/Getty Images)

COLUMBIA, S.C. (AP) — Fifty years after his Apollo 16 mission to the moon, retired NASA astronaut Charlie Duke says he’s ready for the U.S. to get back to lunar exploration. Duke said Friday that part of that effort will come in the form of the Artemis program, with NASA’s upcoming flight to the moon with its new Space Launch System rocket. Duke has been making speeches recently to mark the 50th anniversary of his Apollo 16 space flight. He was in South Carolina to speak to a group of middle school students from his hometown of Lancaster.