<p>LOS ANGELES — Clad in white peace bibs, an American watchdog group called Global Exchange (search) tours schools and hospitals in Baghdad, chronicling what they claim is a U.S.-led occupation and arguing for U.S. troops to leave Iraq.</p>
<p>But thousands of miles away, mothers like Barbie Aston offer a different perspective. They are part of a congressionally chartered, non-profit military support group called Blue Star Mothers (search). Aston, whose son Matt recently earned a two-week leave from Tikrit, said Global Exchange offers "leftists tours" of Iraq.</p>