<p>The Army's new state-of-the art infantry vehicle slated to make its combat debut in Iraq in October is vulnerable to the kind of rocket-propelled grenades now being used by Saddam Hussein's guerrillas, a consultant's report charges.</p>
<p>The Army, which rebuts the report's findings, plans to send 300 Stryker armored vehicles and 3,600 soldiers to Iraq. This first Stryker brigade will help put down the resistance that has killed more 60 American troopers since May 1. It will also be a preview of a lighter, more mobile Army for the 21st century.</p>