Dr. Conrad Murray Surrenders

Motorists are being advised to use extreme caution while traveling in northwest Iowa as a herd of buffalo are running loose. KELO-TV's Don Jorgensen reports.

Baseball star Roger Clemens is accused of lying to Congress when he said he never used steroids. Now on his trial, his former trainer is expected to testify. Danielle Nottingham reports.

Even though Mitt Romney's staff said his commencement speech for Liberty University would stay away from politics and his race for the presidency, Romney couldn't resist taking a shot at President Obama.

Stuntman Nik Wallenda crosses the Baltimore Inner Harbor - about 300 feet - on a high wire 100 feet above the ground.

Former Edwards spokeswoman Jennifer Palmieri came to testify for the prosecution in the trial of former presidential candidate John Edwards. Dick Brennan reports Palmieri described a scene from 2007 where an irate Elizabeth Edwards blew up at donors who were supporting her husband's pregnant mistress.

The "Martian Pink" - the biggest pink diamond ever to appear at auction - is expected to go for more than $8 million when it is sold at the upcoming Christie's Magnificent Jewels Spring Sale in Hong Kong. CBSNews.com's Nick Dietz reports.