Local News Activist Swims In Gowanus April 22, 2015 / 2:59 PM EDT / CBS News The Gowanus Canal (credit: Al Jones/1010 WINS) Gownaus Canal Swim Christopher Swain, at left, talks to police before swimming in the Gowanus Canal on April 22, 2015. (credit: Marla Diamond/WCBS 880) Gownaus Canal Swim Christopher Swain swims in the Gowanus Canal on April 22, 2015. (credit: Marla Diamond/WCBS 880) Gownaus Canal Swim Christopher Swain swims in the Gowanus Canal on April 22, 2015. (credit: Marla Diamond/WCBS 880) Gownaus Canal Swim Christopher Swain swims in the Gowanus Canal on April 22, 2015. (credit: Marla Diamond/WCBS 880) Gownaus Canal Swim Christopher Swain swims in the Gowanus Canal on April 22, 2015. (credit: Marla Diamond/WCBS 880) Gownaus Canal Swim Christopher Swain swims in the Gowanus Canal on April 22, 2015. (credit: Marla Diamond/WCBS 880) Gowanus Canal Swim Christopher Swain rinses his mouth with hydrogen peroxide after swimming in the Gowanus Canal on April 22, 2015. (credit: Al Jones/1010 WINS) Gownaus Canal Swim Christopher Swain emerges from the Gowanus Canal after swimming in the polluted waterway on April 22, 2015. (credit: Marla Diamond/WCBS 880) Gownaus Canal Swim Christopher Swain prepares to talk to reporters after swimming in the Gowanus Canal on April 22, 2015. (credit: Marla Diamond/WCBS 880)