The 2020 Tokyo Olympics are less than a year away, and Americans are again expected to finish ahead of the competition in the pool.U.S. swimmers have dominated the podium at the Olympics on both the men’s and women’s side. Nine of the top 10 most decorated male Olympic swimmers in history are Americans, led by Michael Phelps with 28 medals. Six of the top 10 women are from the U.S., led by Jenny Thompson with 12 total medals. One way Americans have gained a competitive edge is technology used in and out of the pool. For that, USA Swimming leans on high-performance manager Russell Mark, a former aerospace engineer who swam on three Atlantic Coast Conference championship teams at Virginia.