has passed something that tells nhtsa there is a problem.ast optimistic? >> i am optimistic. i think it will get done. >> reporter: in response to our reporting, massachusetts senator ed markey introduced legislation to fix the problem. regulators now have two years to draft a new strength standard pending approval by the secretary of transportation. >> cbs and the families put the spotlight on this critical issue. now it's time for nhtsa to respond. ♪ happy birthday ♪ >> reporter: as andy and liz warner remember tailor 11 years later, they're now finding a moment of peace amid their heartbreak. >> you always second guess yourself as being the person in that seat. knowing that legislation is being passed helps take some of that weight off my shoulders. >> we still miss her every single day, but then we know that her life meant something. that we love her, and we're very proud of her and thank her for what she is doing to help others in the future. >> reporter: now nhtsa says safety is its top priority, and it will work to meet its congressio