The almost-new Prudential Center in downtown Newark was shut down yesterday. Officials say there were issues "related to its smoke evacuation system," according to the Star-Ledger, which also notes the arena has had to pay for city firefighters to stand in stairwells during events because of these issues. New Jersey Devils owner Jeff Vanderbeek and Mayor Corey Booker were spotted heading into the center this morning, to find out what was going on.......