'Permanent bone loss': Calgary study finds astronauts suffer on return to Earth

FILE - Canadian astronaut Robert Thirsk talks with students from Rockcliffe Elementary School as they get a first look at The Living In Space exhibit during its unveiling at the Canadian Aviation and Space Museum in Ottawa on Thursday, May 12, 2011. (THE CANADIAN PRESS/Sean Kilpatrick) FILE - Canadian astronaut Robert Thirsk talks with students from Rockcliffe Elementary School as they get a first look at The Living In Space exhibit during its unveiling at the Canadian Aviation and Space Museum in Ottawa on Thursday, May 12, 2011. (THE CANADIAN PRESS/Sean Kilpatrick)

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Medical investigator rules Baldwin set shooting an accident

The fatal film-set shooting of a cinematographer by actor Alec Baldwin last year was an accident, according to a determination made by New Mexico's Office of the Medical Investigator following the completion of an autopsy and a review of law enforcement reports.