Do your Allen Iverson imitation, but instead of "practice," try saying "alleged" in your most disbelieving voice. . . On today's Good Morning America, the normally politically-correct Dan Harris took surprising issue with Ron Claiborne's insistence on calling a caught-on-tape convenience store shooter an "alleged" robber. The show rolled the security video several times, showing the "alleged" robber repeatedly shooting right at the woman at the register. Said an incredulous Harris "I like how you call him an 'alleged' robber. I think we can say, given the video, he did it." Responded Claiborne: "I'm not going there, Dan. Innocent till...