Much uncertainty still surrounds China’s balloon spying program and the other mysterious objects that have now been identified over North American airspace. One thing seems certain, however: incidents like these could too easily spiral out of control in the future, ending in disaster. Unless something is done, dangerous waters lie ahead. Unfortunately, both sides are reluctant to do what’s needed. Let’s make no bones about it. It would be better if China didn’t spy on the United States. Any US leader would be hard pressed not to shoot down a Chinese object that the American public has seen flying over...