Unions tell Kerry not to cross picket lines Friday, June 25, 2004 11:07 AM (Boston - AP) — The Boston Police Patrolmen's Association has a message for Democratic presidential candidate John Kerry: Don't cross our picket lines when you come to town on Monday. The union is promising to picket events associated with the US Conference of Mayors taking place in Boston over the next several days. Kerry is scheduled to speak before the municipal leaders on Monday. But police union president Thomas Nee says they want Kerry to honor their picket lines. The police union has been working without...