60 Minutes - Season 58 Episode 27 -

Correspondent Scott Pelley revisits one charity, Remote Area Medical, that delivers aid to Americans cut off from healthcare by location and cost; Correspondent Jon Wertheim reports on the state of high-speed rail in the U.S., which has become a stand-in for a broader question: can America still build big things?; Correspondent Bill Whitaker meets the Mardi Gras Indians, also known as Black Masking Indians, one of America's last secret societies preserving a culture dating to the 1800s.