ABC News' "Good Morning America" announces a walking challenge and month-long series for National Walking Month. "GMA" co-anchor Robin Roberts will kick off "Walk with GMA" by leading ABC News correspondents, staff and 200+ walking enthusiasts through New York City, which will converge on "GMA"'s studios in Times Square on Wednesday, May 10. Walking groups from across the country will join the challenge, notably in Philadelphia, Houston, Chicago and Atlanta. "GMA" will team up with walking clubs in select cities, encouraging everyone to walk one mile on May 10 and share photos using #WalkwithGMA.

Additionally, "GMA" will feature stories throughout May about the physical and mental benefits of walking, share stretching tips, profile the latest walking gear and figures in the walking community and more.