There wasn’t any reason to think Cole James Bridges was anything more than an average young American. After he graduated from high school, he worked at a Papa John’s pizza shop in Stow, Ohio, for a while, and then, in Sept. 2019, joined the U.S. Army. He got sent to Fort Stewart in Georgia, where he became a cavalry scout. Thousands of young Americans have followed paths similar to the one Bridges embarked upon, but then he took a sharp turn no one expected: on Wednesday, Cole James Bridges pleaded guilty to trying to aid ISIS’ efforts to kill American...