David Muir, acclaimed host of ABC's "World News Tonight," has a long and decorated history on air. Muir first made his mark on ABC back in 2003 when he became an anchor for "World News Now" after a three-year stint on WCVB. He then stepped into the role of Diane Sawyer's predecessor on "World News Tonight" in 2014. As host of the evening news series, Muir received millions of viewers nightly. Throughout his years delivering the news, Muir has made cringeworthy mistakes caught by audiences , collected himself an arsenal of bad moments on air, and made some missteps in his career.

Yet, the news anchor remained successful. What you need to know about Muir is that he will continue his efforts to make his mark. "I think it's really important to continue to try being better," he told Peopl

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