Without evidence, President Trump and other administration officials claimed that DEI programs led to Wednesday's fatal air crash. DEI has recently become a common talking point to blame disasters on.

NPR's Mary Louise Kelly speaks to author Joseph Finder about his new thriller novel The Oligarch's Daughter, a tale of a man on the run from an elusive and mysterious adversary.

In the 1960s, the U.S. Navy was exploring the other "final frontier" -- the sea. A series of underwater habitats called "Sealabs" were constructed for scientific exploration on the ocean floor.