WASHIINGTON (AP) — Colin Powell, former Joint Chiefs chairman and secretary of state, has died from COVID-19 complications.

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In an announcement on social media Monday, the family said Powell had been fully vaccinated.

He was 84. Powell was the first African American to serve as chairman of the Joint Chiefs of Staff and secretary of state.

But his reputation was forever stained when, in 2003, Powell went before the U.N. Security Council and made the case for U.S. war against Iraq.

He cited faulty information claiming Saddam Hussein had secretly stashed away weapons of mass destruction.

Iraq’s claims that it had not represented “a web of lies,” he told the world body.

Answers to 25 common COVID-19 vaccine questions

Vaccinations for COVID-19 began being administered in the U.S. on Dec. 14, 2020. The quick rollout came a little more than a year after the virus was first identified in November 2019. The impressive speed with which vaccines were developed has also left a lot of people with a lot of questions. The questions range from the practical—how will I get vaccinated?—to the scientific—how do these vaccines even work?

Keep reading to discover answers to 25 common COVID-19 vaccine questions.