This blog is written by Jen Roberts, a #ONEonTour volunteer at U2’s new show.  ONE Volunteer Jen Roberts in St. Louis with her sister Nicole Sardo, and her daughter Emma Roberts. With less than an hour before U2 takes the stage, there’s a buzz inside the Scottrade Center in St. Louis as concert attendees stock up on concert merchandise and refill their beers. After a couple hours collecting petitions outside, fellow ONE volunteers and I employed a different tactic inside: stand next...