How the Crimea crisis affects the whole world05:59
NBC News' Peter Alexander reports the latest on Crimea, and economist Jeffrey Zachs joins to discuss the effect of the crisis on the global economy.
Can marijuana help wean addicts off heroin and other opiates?04:48
Safe injection sites: A radical new approach to battling addiction05:54
To win Oscars, movie stars and studios sometimes go to extreme measures04:52
#OscarsSoMale? Hollywood is biased against female directors, some charge05:13
Side guards: New push to make safety devices on trucks mandatory05:33
‘America’s Chernobyl’: Inside the most toxic place in the nation07:30