defending their country from russian aggression . u.s. president joe biden is headed to japan after wrapping up a three-day visit to south korea. he left owe sawn air base just outside seoul a short time ago, expected to arrive in japan in about an hour to mark his first trip to asia as commander in chief. while biden has tried to focus on bolstering america s economic ties in the region, the shadow of potential conflict is never far away. saturday the u.s. and south korea announced plans to hold joint military drills. blake essig is in tokyo with a preview of what to expect from the japan leg of biden s trip. let s start with paula hancocks. so the headline was the resumption of joint military drills, but there were important economic issues at stake here too. what headway did president biden make while he was there? reporter: kim, the headlines that he really wanted to see was about the economic ties that he had. he had developed here. and president biden was in the reg