Israeli air strike kills Hamas commander in Gaza           Pakistan spy chief scraps UK trip on "terror" remarks           Merkel attends memorial for 21 Love Parade victims           U.S. worried more secret documents may be released           Australian PM vows to fight after poll predicts defeat           Blast hits China tax office in apparent attack           Dozens killed and stranded by Afghanistan floods           Fidel Castro says U.S. mistreating convicted spies           Iran quake injures 274           Arizona immigration law appeal set for November