The journalist Kara Swisher discusses Elon Musk’s goals in government — and the factors that have led to his radicalization.

A small aircraft crashed on an avenue in Sao Paulo shortly after taking off from a nearby private airport, killing at least two of its passengers, the local firefighter corps said in a statement.

Donald Trump and Elon Musk’s gutting of U.S.A.I.D. will weaken Washington’s reach, but the U.S. was already losing the fight ...