Deaf swimmers will be allowed to use hand signals at the at the U.S. Olympic trials this summer. That's the decision from USA Swimming. It's a switch from the organization’s decision earlier this week, that said signals would not be allowed because international rules don't allow them. Swimmer Marcus Titus had asked his supporters to make their opinions known in support of deaf athletes. Titus is one of the country's top breaststrokers, posting the fastest time at last month's 100-meter breaststroke which beat four-time Olympic medalist Brendan Hansen. Deaf swimmer Terence Parkin of South Africa took the silver medal in the 200 breaststroke during the 2000 Olympics in Australia.