u.s. army veteran recently arrest charge plot coordinate terrorist attack behalf islamic state civilian target military installations kansas city.federal investigators believe robert hester want murder former military comrades civilians series bus train attack carry president day washington post report thursday.hester arrest follow months-long fbi investigation 25-year-old meet undercover fbi agents pose isis operatives express desire reap mass casualties unite states.hester father two serve short stint army begin 2012. face series disciplinary issue receive general discharge 2013.three years late hester convert islam change name post anti-government message social media.the army veteran arrest last week charge attempt provide material support foreign terrorist organization.in late january hester meet one undercover fbi agent pose isis contact ask veteran purchase series items could use make bomb include 9-volt batteries duct tape copper wire nail hester bring bomb supply late meet hand undercover agent.hester final meet undercover agents last week bring box nail use shrapnel bomb tell agents friday felt good help strike back true terrorist first social media face-to-face meet undercover fbi employee defendant repeatedly express intent engage act violent jihad unite state u.s. attorney western district missouri tammy dickinson say statement believe part isis-sponsored terrorist attack would result deaths injuries many innocent victims wfb arrest muslim us army vet charge plot terror attack us behalf isis