On the 20th anniversary of the September 11, 2001, terrorist attacks, see how Americans have marked the event over the years.
As part of the newest class of NASA astronauts, Jonny Kim is cleared for flight to the International Space Station, the moon and beyond.
Two U.S. female astronauts made history walking on the International Space Station without a male crewmate.
See a colorful image of the Southern Crab Nebula, about 7,000 light-years from Earth, transmitted by the Hubble Space Telescope.
Hurricane Maria recently pummeled Puerto Rico and its Caribbean neighbors. These images capture the destruction and ongoing relief efforts in Puerto Rico.
This photo gallery shows the destruction brought by Hurricane Irma, which battered Florida in early September, and relief efforts to help victims.
Check out some events in the month-long celebration of Lesbian, Gay, Bisexual, Transgender and Intersex (LGBTI) rights.
"Continuing Promise" brought U.S. military members to Colombia, Guatemala and Honduras to provide medical care and other humanitarian efforts.
Washingtonians are loving 'Infinity Mirrors,' an exhibition showcasing the polka dots, pumpkins and mirrored rooms of Japanese artist Yayoi Kusama.
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