WASHINGTON (AP) — With few confirmed details from President Joe Biden's White House, the downing of three unknown aerial objects in as many days by U.S. fighter jets has prompted wild speculation about what they were and where they came from. It even fell to his press secretary on Monday to announce earnestly there was no indication of "aliens or extraterrestrial activity."

The president had no public events Monday and has offered little reassurance or explanation of what to make of it all, following the discovery of a Chinese spy balloon crossing the country and the unprecedented peacetime sh...