Biden works the crowd. Charleston, South Carolina, Feb. 25, 2020. Photo by Robert Yoon

Days before the South Carolina Democratic presidential primary that would save his candidacy, former vice president Joe Biden talks with voters after a CBS News presidential debate in Charleston, South Carolina. Feb. 25, 2020

A lot of people had written off Joe Biden's candidacy when this photo was taken. He had just finished 4th in Iowa, 5th in New Hampshire, and 2nd in Nevada. He would need a big win in South Carolina to signal that he was still a viable candidate. Immediately after a CBS News debate in Charleston, when most candidates headed to the spin room to talk to reporters, Biden was the only candidate who remained on stage and spoke with members of the audience. Although this was also consistent with his campaign's practice of minimizing press access to the candidate, he was in his full element talking with audience members, shaking hands, and taking selfies. Biden went on to win the South Carolina primary four days later, had a strong showing on Super Tuesday, and went on to claim the Democratic nomination.

Buttigieg makes it official, South Bend, Indiana, April 14, 2019. Photo by Robert Yoon

Mayor Pete Buttigieg formally launches his presidential campaign at a former Studebaker plant in South Bend, Indiana. April 14, 2019

The Buttigieg campaign had grand plans for an outdoor campaign launch event in downtown South Bend, Indiana. It would have been within eyesight of the 114-year-old Jefferson Boulevard Bridge which the mayor spoke about frequently in his speeches as an allegory and had incorporated into his campaign logo. Heavy rains forced the event indoors, and roughly 4000 supporters squeezed into a former Studebaker plant that was only slightly drier than the outdoors.

Rep. John Lewis and police officer, Philadelphia, Pennsylvania, July 29, 2016. Photo by Robert Yoon

Rep. John Lewis and Amtrak police officer Neil Trugman share a quiet moment at 30th Street Station after the Democratic National Convention in Philadelphia. July 29, 2016.

I've seen or met Rep. John Lewis on a number of occasions in my capacity as a journalist. Each time, I was always very moved by the graciousness that he showed to complete strangers like myself and to observe the emotional reactions other people had to him. I snapped this photo at Philadelphia's 30th Street Station after the Democratic National Convention. Lewis was waiting for his train when an Amtrak officer, Neil Trugman, approached him and expressed his admiration. Lewis enveloped the officer’s hands in his own and spoke very quietly while the officer slowly nodded his head and closed his eyes. I don't know what they said, but it was a very touching moment. A few months later, Trugman was named Amtrak's chief of police.

Rep. John Lewis and Khizr Khan, Philadelphia, Pennsylvania, July 29, 2016. Photo by Robert Yoon

A chance encounter between Rep. John Lewis and Gold Star parent Khizr Khan at Philadelphia's 30th Street Station after the 2016 Democratic National Convention. July 29, 2016.

You never know who you'll run into at the train station. I happened to be there when Khizr Khan, a Gold Star parent who gave one of the more memorable speeches at the 2016 Democratic National Convention, and civil rights icon and member of Congress John Lewis had a chance encounter at Philadelphia's 30th Street Station. That year's event would end up being the final Democratic convention of Lewis' career.