A high-level U.S. executive who was kidnapped after crossing the border managed to escape yesterday after grabbing a revolver while two kidnappers were dozing. Yong Hak Kim, a U.S. citizen who was born in South Korea, locked his abductors in a bathroom of the house where he was being held and ran outside for help, Mexican authorities said. Kim was picked up by police after a resident called authorities to report a street disturbance. Hours later, as he was en route to the United States, Mexican authorities announced the detention of five suspects in connection with the Thursday morning kidnapping....