Russia and China are coordinating military exercises to threaten not only Taiwan but also Hawaii, according to a senior Japanese defense official who warned the United States to beware of a Pearl Harbor-style surprise attack.“We have to show the deterrence towards China, and not just China but also the Russians, because, as I told you, that they are doing their exercises together,” Japanese deputy Yasuhide Nakayama told the Hudson Institute this week.Taiwan’s vulnerability to an invasion from mainland China has become a preoccupation of Indo-Pacific strategists in recent months, as Chinese Communist forces escalate their military drills around the island....