Former U.S. basketball superstar Dennis Rodman on Tuesday arrived in North Korea, saying he will try to "open the door" at a time when regional tensions remain high over Pyongyang's nuclear and missile programs.His arrival came just hours ahead of U.S. Secretary of State Rex Tillerson's announcement that North Korea has released Otto Warmbier, an American university student who was sentenced last year to a 15-year prison term with hard labor after he tearfully confessed to trying to steal a propaganda banner.Rodman, who is known to have close ties with North Korean leader Kim Jong Un, told …READ FULL ARTICLE