City cancels rock station s dollar drop promoHv PETER WARDSun StaffLOWELL Fearing for the public s safe ty, city officials Thursday grounded a rock-and-roll radio station’s plan to drop 10,000 $1 bills from a helicopter onto dowtown1 xwe 11City Manager James Campbell, after meeting Wednesday with Police Superintendent John Sheehan, decided that Worcester based radio station WAAF's plan was not in the best interest of thecitv.”Our initial feeling was that it would be awe went along, we decided there were too many elements of risk, Campbell saidtodayThe event, designed to promote the radio station and stimulate business downtown, was scheduled for Saturday at 1:07 p.m Noofficial announcement of the cancella tion was planned until sometime today. As of late this morning, WAAF promoters wen-still planning on the money drop Campbell met with Sheehan and Deputy Police Superintendent William Finn Wednesday night and left the question of safety in their hands.Concerned with the confined downtowngood event to promote the downtown, but as Please see DOLLARS/4