US shoots down 4th object, this time over Lake Huron

US warplanes shot down another flying object yesterday, this time over Lake Huron on the US-Canadian border, the fourth in a dramatic series that began with the downing of a suspected Chinese spy balloon a week ago.

Jittery Americans have been watching the skies as the mysterious incursions unfolded against a backdrop of acute tensions with China – although only the first object has so far been attributed to Beijing.