The details emerging of the alleged terror plot aimed at Taylor Swift’s three Vienna concerts are scant, but already adhere to a chilling pattern familiar to European counterterrorism officials. Austrian police said Wednesday that a 19-year-old man was arrested in Ternitz, about an hour’s drive from where Swift was scheduled to perform Thursday, Friday and Saturday for an expected 65,000 fans each night at the Ernst Happel Stadium. “Chemical substances” possibly linked to bomb-making were discovered in a search of the Austrian citizen’s home, police said, declaring that “specific preparatory measures have been undertaken” to target Swift’s concerts. The search of the area around the home led to 60 households being evacuated, local media reported, with police adding it continued into the evening. A second suspect was arrested in Vienna that afternoon. Police did not give their age or gender, citing an ongoing investigation that appeared to be widening in scope. “Further…
