Teens’ attitudes toward marijuana are shifting as more states legalize the drug. CBS News chief medical correspondent Dr. Jon LaPook talks about the risks with addiction psychiatry specialist Dr. Stephen Ross. Source

The first lady honors actress Cicely Tyson, plus Liam Neeson and Julianne Moore hit the red carpet for “Non-Stop.” Bigad Shaban has today’s Eye on Entertainment. Source

Doctors in California are trying to unravel a medical mystery of a handful of children afflicted with polio-like illness. CBS News medical contributor Dr. Holly Phillips reports. Source

Beijing is suffering through a week of dangerous air pollution levels. One man is taking the Chinese government to court because of all the smog. Seth Doane reports on the nation’s pollution problems. Source

There are more than 43,000 apps that focus on health and medicine. Dr. Zubin Eapen, cardiologist and assistant professor at Duke University, talks about some apps that monitor your heart with the “CBS This Morning” co-hosts. Source

Series creator Beau Willimon and and actress Kate Mara discuss the shocking (spoiler) that happens during the season’s opening episode. Source

Matthew McConaughey has been earning lots of praise for his performance as an AIDS-infected drug user in “Dallas Buyers Club.” The Oscar-nominated actor told CBS News’ Lee Cowan that finances and the shooting schedule were constant concerns while filming the low-budget indie feature. Source

Series creator Beau Willimon and actress Kate Mara discuss fan reaction to some of the show’s new story lines, and how the series diverges from its BBC predecessor.  Source

Series creator Beau Willimon and actress Kate Mara discuss the thrill of being lauded by President Obama on Twitter, and the early reaction to show’s second season. Source

Beau Willimon discusses his vision for Francis and Claire Underwood (played by Kevin Spacey and Robin Wright), and why he sees the couple’s marriage as a successful one. Source