WASHINGTON (AP) — Members of Congress say they have serious concerns about Americans' safety at next month's Olympics in Russia, and they want Moscow to cooperate more on security. Russian President Vladimir Putin has promised his country will do all it can to ensure a safe Olympics. The State Department has advised Americans planning to go that they should keep vigilant about security because of potential terrorist threats, crime and uncertain medical care. Rep. Mike Rogers of Michigan says the U.S. doesn't seem to be getting all the information needed to protect American athletes, and that must change. Texas' Rep. Michael McCaul says he plans to be in Sochi Monday to assess the situation. Rogers was on CNN's "State of the Union" and CBS' "Face the Nation." McCaul was on ABC's "This Week."