NATIONAL

An article on Tuesday about President Trump’s decision to send a delegation to Geneva for nuclear talks with Russia misstated a security agency that will send representatives to the arms control discussions. It is the National Nuclear Security Administration, not the National Security Agency.

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An article on Tuesday about Ghislaine Maxwell’s relationship with Jeffrey Epstein, the financier accused of sexually trafficking and abusing girls, misidentified the university that the investment banker Euan Rellie attended. He studied at Cambridge, not Oxford.

NEW YORK

A picture caption with an article on Tuesday about the cause of a blackout in Manhattan on Saturday misidentified the location in the image. It showed a darkened area just north of Columbus Circle, not Columbus Circle itself.

SCIENCE

Because of an editing error, an article on Sunday about the astronaut Michael Collins and his role on the Apollo 11 mission misstated the year in which his book “Carrying the Fire” was first published. It was 1974, not 1979.