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A calf known as "Hero" is mobile again after undergoing surgery that helped fit him for prosthetic legs. Staff at the Texas A&M College of Veterinary Medicine have cared for Hero since the calf lost two of his hooves last year due to frostbite

A calf known as "Hero" is mobile again after undergoing surgery that helped fit him for prosthetic legs. Staff at the Texas A&M College of Veterinary Medicine have cared for Hero since the calf lost two of his hooves last year due to frostbite. KBTX-TV's Clay Falls reports.

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In the months following the assassination of President John F. Kennedy, his wife, the first lady, Jackie Kennedy received nearly 800,000 letters from people around the world expressing their sympathy and their own grief

In the months following the assassination of President John F. Kennedy, his wife, the first lady, Jackie Kennedy received nearly 800,000 letters from people around the world expressing their sympathy and their own grief. Anthony Mason reports on the letters release online for the first time.

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Watchdog group Public Citizen has documented 125 sites with possible problems that could lead to leaks across the pipeline

The Keystone pipeline is designed to bring crude oil from Canada to refineries in Texas, and supporters say it will create thousands of jobs and help energy independence. CBS News has obtained warning letters from the federal agency that regulates pipelines to Keystone's owner, saying it failed to use qualified welders and noting dents have been found in pipes. Anna Werner reports.

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