On the 50th anniversary of Woodstock, correspondent Bill Weir takes a trip across America, speaking with legendary musicians who performed at Woodstock and examining the historic event's impact on future generations.

CNN chief medical correspondent Dr. Sanjay Gupta goes on a nationwide investigation to look at the real-life impact of dozens of deregulations at the EPA and what it means for the health of American families.

Alisyn Camerota takes a look back at the NBC sitcom "Friends" which debuted in September 1994.