NEW : Polish diplomat released from hospital , to be treated further in Europe . Blast ##s the envoy , Gen. Edward Pietrzyk , and kills five . In Washington , Iraq 's national security adviser met with top Bush administration officials on Tuesday and Wednesday , according to one of his aides . Car bombs in Baghdad , strike Polish convoy . US Joint Chiefs Chairman begins weeklong visit to Iraq , Afghanistan .
NEW : Polish diplomat released from hospital , to be treated further in Europe . Blast ##s the envoy , Gen. Edward Pietrzyk , and kills five . Car bombs in Baghdad , strike Polish convoy . US Joint Chiefs Chairman begins weeklong visit to Iraq , Afghanistan .