Hunter Armstrong had his work cut out for him in the 100m backstroke event at the Olympic Swim Trials. He swam all the way back, though, to qualify for the final in the event tomorrow. Armstrong found himself in last coming off the wall at the start of the heat. Still, by the end of it, he finished in second to earn his spot in advancing to the final round. “I typically don’t think while I’m in the water,” Armstrong said afterward about his thought process in the moment. “I think the minute you become conscious when you’re swimming is when you slow down. But the very first thing to go through …