US on high alert after military shoots down another UFO

Earlier this month, a Chinese spy balloon was taken <br>down by a US missile off the coast of South Carolina. <br>Then this weekend, three objects were shot down over <br>Alaska, Canada and Michigan but the US military has not <br>said where they believe they originated. <br>A fortnight ago the world barely knew anything about <br>high altitude spy balloons. Now they've inflated the <br>already very bad vibes between the world's two most <br>powerful nations.