text:  Fox News. I'm Sue Guzman. U.S. military bases in Europe are on high alert over a threat of terrorism. A U.S. defense official telling Fox News there is credible intel pointing to an attack over the next week or so. The official, who declined to be identified because he's not authorized to speak with the media, says he could not detail the exact threat to the public. Fox's Kathleen Maloney. The Supreme Court could rule Monday on a claim by former President Trump that presidential immunity shields him from prosecution.