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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.

Denver-based Boom Technology's XB-1 demonstrator plane hit Mach 1.122 — 750 mph. It's the first independently developed supersonic jet. The company is also working on a supersonic passenger airliner.

Robert F. Kennedy Jr. has built his fortune and reputation on disparaging the government scientists and institutions he's now in line to lead as HHS secretary.

In confirmation hearings for his nomination as secretary of the Department of Health and Human Services, the focus was on domestic issues. The agency has a vast global scope as well.

City leaders said that their aim to reduce homelessness by 50% in time for 2027 remains unchanged.

Monday's ceremony in Poland is regarded as the likely last major observance of Auschwitz's liberation that any notable number of survivors will be able to attend, due to their advanced ages.

Questlove's documentary, Ladies & Gentlemen... 50 Years of SNL Music, highlights the show's most iconic musical performances and comedy sketches — and addresses the show's "unhummable" theme song.

This special primary election, slated for Tuesday, is set to determine who will be in the running to fill empty seats left by Republican representatives.

The long trek home by Palestinians comes as mediators helped end twin crises over ceasefires in Gaza and Lebanon.

Ceasefires in Israel's conflicts with Hamas and Hezbollah hit snags. A disagreement over a hostage prevented Palestinians' return to northern Gaza. In Lebanon, Israeli troops clashed with protesters.