April 20, 2011 1:46 pm Dogs Trained to Smell Low Blood Sugar For some diabetics, a canine companion can be a life saver. US & World Videos 1:24 NASA releases black hole visualization 0:49 US pauses arms shipment to Israel over Rafah assault 3:06 Kim Kardashian being booed at Tom Brady's Roast edited out of Netflix special 2:49 Daughter surprises mom with emotional letter of thanks for Mother's Day 1:32 Zendaya's Met Gala style details with Law Roach