The 20-year-old who, six months later, would open fire at President Trump at a Pennsylvania campaign rally — striking his ear and killing an audience member — was busy polishing his applications to transfer from community college to a four-year engineering program. Crooks was gathering transcripts and asking friends to review his personal statement. He was also designing a bomb. Oh. Yeah, kind of an important fact to throw into the mix. Apparently, Crooks had placed an order for “more than two gallons of nitromethane from an online speciality fuel retailer using an encrypted email account.” “Twelve days later Crooks’...