Nathan Adrian wins 50 free at USA Swimming nationals, with Will Copeland, Matt Grevers and Vladmir Morozoc taking top three; Missy Franklin and Ryan Lochte impressive in two events each on first night, with Lochte winning 200 IM; Katinka Hosszu wins 200 IM in blazing time; Sisters Alyssa and Haley Anderson stage virtual 500 free race; USA Swimming releases athlete partnership agreement; Steve Lochte and Kristin Lochte under investigation at Daytona State College.