Donald Trump personally welcomed home three Americans released from detention in North Korea, a triumphant middle-of-the-night moment for the president as he prepares for a landmark summit with Kim Jong Un.

With its history of clashing with regulators and its autonomous car fleet grounded over a pedestrian death, Uber might seem the least likely candidate to launch a flying taxi service.

House Democrats early Thursday released the full slate of roughly 3,500 advertisements purchased on Facebook by the Russian Internet Research Agency, most during the 2016 campaign, in what U.S. intelligence agencies said was Moscow’s attempt to sow discord and boost Donald Trump’s candidacy.

The U.S. Geological Survey has warned that the summit of Hawaii’s Kilauea volcano could experience explosions in coming weeks and send large quantities of ash into the air.