Greg Myre

This story was originally published on Oct. 20, 2017, and is being republished with minor changes to update.

When U.S. troops were ambushed in Niger last October, the widespread reaction was surprise: The U.S. has military forces in Niger? What are they doing there?

The Pentagon has started briefing the families of four soldiers killed in an ambush in Niger last October, and the military acknowledges a series of missteps contributed to the deaths, one family member told NPR.

"I think in any instance where people lose there lives, there were obviously mistakes that were made," said Will Wright, the brother of one of those killed, Staff Sgt. Dustin Wright. Will Wright is himself a combat veteran, having served as a staff sergeant in Afghanistan. He and his family were briefed by military officers on Thursday.

John Brennan's tenure as CIA director ended the same day that President Trump entered office last year, and since then, the former spy chief has been a relentless critic of the president.

"I think he is dishonest, he lacks integrity, he has very questionable ethics and morality, and he views the world through a prism of 'how it's going to help Donald Trump?,' " Brennan said in a wide-ranging interview with All Things Considered.

"I just think that he has not fulfilled the responsibilities of the president of the United States," Brennan added.

Gina Haspel, the first woman nominated to lead the CIA, has a five-foot-tall poster of Johnny Cash in her office. She's an avid University of Kentucky basketball fan — though she transferred from that school and graduated from the rival University of Louisville. She majored in journalism.

President Trump likes Mike Pompeo.

Trump's decision to dispatch Pompeo for a secret meeting with North Korean leader Kim Jong Un is the latest and most dramatic demonstration of how the president keeps elevating Pompeo's role.

In a turbulent administration, Trump has dismissed several top national security and foreign policy advisers, including former Secretary of State Rex Tillerson. The president has nominated Pompeo, the CIA director, to replace Tillerson.

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