Journalism professor Jay Rosen, who attended the Democratic national convention, says the "great overlooked story in all the reporting" was the heightened security situation. "It was in your face, nonstop, in thousands of ways inside what was called, in military terms, The Perimeter," Rosen writes. "It came lunging at you as you approached the site and enveloped all when you were on site. You could have your credentials checked twenty times on a single trip from the ground floor to your seats. ...