It's easy to take for granted that if something is available for purchase in the U.S., it's safe. Sadly, that's not always the case. When tragedies happen, it usually falls to government regulators to clean up the mess with recalls and new rules to help prevent future accidents. This week, for example, the Food and Drug Administration has for the fifth time this year expanded its recall of the common blood-pressure drug losartan because of contamination with a chemical linked to cancer. From dangerous cars and toys to food to baby gear, here are 15 times potentially deadly products had to be yanked off the market before anyone else got hurt.