By the time David Baldwin cycled past the Lincoln Memorial and down the Mall on Sunday afternoon, he had already logged 3,500 miles on his bike since embarking on a cross-country ride nearly two months ago.

Just minutes before, as he was crossing the Potomac, three Marine helicopters — likely carrying the president — flew by overhead.

Welcome to D.C., Baldwin thought, as he scrambled to capture the moment on his GoPro.

Baldwin, 53, is cycling across the United States in a campaign called the “Pursuit Ride” to raise money for and awareness about the lack of employment opportunities for adults with disabilities. The money raised will help fund The Center, a Houston-based nonprofit for people with intellectual and developmental disabilities where Baldwin serves as a board member.

Read the full article in the Washington Post online.