Bum start for CNN's 'Zahn' and 'Cooper'Best hopes for stemming slide against Fox News By Kevin Downey CNN's hopes of reclaiming No. 1 from Fox News Channel were dealt a major setback this week with the disappointing premieres of “Anderson Cooper 360” and “Paula Zahn Now.” The audience for “Cooper” on Monday was down 47 percent in the 7 p.m. time slot occupied last year by “Crossfire,” to 319,000 people, while “Zahn's” audience of 508,000 people was down 45 percent in the 8 p.m. time slot briefly occupied by the canceled “Connie Chung.” All figures are based...