Over 85,000 bags of shrimp are being recalled for potential contamination, marking the latest products to be impacted by a radioactive threat. In a recall notice, the U.S. Food and Drug Administration said three varieties of shrimp sold at Kroger, Walmart and other stores may be contaminated with cesium-137. Cs-137 is a product of nuclear fission and is used in medical devices and gauges, the Centers for Disease Control and Prevention explains. It can also be used to gauge "the flow of liquid through pipes," the agency said, and is "present in the environment from weapons testing in the 1950s and 1960s." Did you purchase any contaminated shrimp? (www.fda.gov)