Chemical and consumer product manufacturer 3M has agreed to pay $6 billion to settle lawsuits from U.S. service members who say they experienced hearing loss or other serious injuries after using faulty earplugs made by the company. Over recent years, hundreds of thousands of veterans and current service members have sued 3M and Aearo Technologies, a company that 3M acquired in 2008, over their Combat Arms Earplugs. The service members alleged that a defective design allowed the earplugs to loosen slightly, leading to hearing damage. That's according to one of the law firms representing plaintiffs. 3M maintains that the agreement was not an admission of liability — and said the earplugs are safe when used properly.