YOKOSUKA NAVAL BASE, Japan — Most U.S. Navy medical personnel in the Pacific — military and civilian — will be banned from smoking or chewing tobacco anywhere during duty hours and while in uniform, in accordance with a recent Navy instruction. Capt. Kevin Moore, commander of U.S. naval health care facilities in Japan, South Korea and Diego Garcia, said during a phone interview Friday that he and his staff are taking the instruction seriously and have begun enforcement. "I was once asked, ‘How can you call yourself a health care organization when you’re allowing people to kill themselves in front...