A year after Colorado became the first state to legalize the recreational use of marijuana, Bill Whitaker takes a look at the results and interviews the governor, who calls the move the most ambitious social experiment of the 21st century.

A new book reports that the controversial Affordable Care Act will eventually become unaffordable because it doesn’t fix the biggest problem of all, the high cost of healthcare. Lesley Stahl reports.

Some of America’s most severely wounded veterans are using their hearts and minds to summit some of the world’s tallest mountains and overcome the disabilities war has dealt them. Lara Logan reports.