Don Reed, former Democratic presidential candidate Elizabeth Warren’s eldest brother, has died of complications from the novel coronavirus, she announced Thursday.

Reed died Tuesday while being cared for by medical professionals, Warren said on Twitter.

A former Air Force service member, Reed was a career military officer who served for five-and-a-half years of off-and-on combat deployments during the Vietnam War, Warren said. He joined the Air Force at age 19.

“He was charming and funny, a natural leader,” she said. “What made him extra special was his smile—quick and crooked, it always seemed to generate its own light, one

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