New Hampshire teacher Christa McAuliffe and other astronauts were honored Thursday by NASA during its Day of Remembrance.

Day of Remembrance honors fallen astronauts with ceremonies nationwide, including wreath-laying at Arlington National Cemetery led by Jim Free and events at various NASA centers.

Federal officials have identified the remains of a U.S. Air Force pilot from Wisconsin who went missing during the Vietnam War nearly 60 years ago.

A collection of artifacts has been found in one of the largest and most complex Chu-era burials ever found. This cache is revealing new things about the birth of China.