text: Karzai's Running Mate Escapes Afghan Mine Blast  KABUL (Reuters) - Afghan President Hamid Karzai's running  mate for Saturday's historic presidential election escaped  unhurt Wednesday when a mine exploded under his convoy in the  remote northeast of the country.  Vice presidential candidate Ahmad Zia Masood, the brother of  assassinated resistance hero Ahmad Shah Masood, had gone to  Faizabad, the capital of mountainous Badakhshan province, for a  campaign rally.