KABUL, Afghanistan -- When The Rendon Group was hired to help Afghan President Hamid Karzai with media relations in early 2004, few thought it was a bad idea. Though Rendon's $1.4million bill seemed high for Afghanistan, the U.S. government was paying. Within seven months, however, Karzai was ready to get rid of Rendon. So was Zalmay Khalilzad, then the U.S. ambassador to Afghanistan and now the...