Jay-Z will commemorate the eighth anniversary of the 9/11 attacks by staging a concert to raise funds for the New York Police and Fire Widows’ and Children’s Benefit Fund, the largest charity serving the survivors of first responders killed in the line of duty.The rapper, a native of Brooklyn, said the show, set for Madison Square Garden on Sept. 11, is something of a full-circle move for him. “I was in Los Angeles making a video the night before 9/11,” he said, “and a friend of mine called the next morning and told me to put the TV on.” The original “The Blueprint” was released the day of the attacks; eight years later, with “The Blueprint 3″ set for release, the rapper and longtime collaborator Kevin Liles, exec VP at Warner Music Group, began piecing together the benefit show, which has been dubbed Answer the Call. While a sellout is likely, there will be lots of opportunity to witness the event, which Jay-Z says will have a number of special guests. “We’re not only airing the concert live on Fuse, but we’re creating a package of programming to air surrounding the event in September,” said Mike Bair, president of MSG Media. “We’ll have interviews with Jay-Z (taping Monday) and a good deal of behind-the-scenes material. We’ll also be using Twitter to get information out.” Tickets go on sale Tuesday, priced at $50.