60 Minutes

An Unlikely Informant, The Unknown America, King of Crossfit (47x33)

Air date: May 10, 2015

Anderson Cooper interviews undercover informant Michael Blutrich, one of the most effective informants ever, according to authorities; then, with over 50 percent of our nation lying underwater, huge discoveries await, says explorer Robert Ballard; and, Sharyn Alfonsi profiles Greg Glassman, creator of the CrossFit workout.