US base in Iraq under rocked attackSun Apr 24, 2011 3:57PMUS forces in IraqSecurity sources say a Untied States military base in eastern Iraq has come under a second rocket attack in less than a week.Three Katyusha rockets hit the Echo Army base near the city of Diwaniyah late on Saturday, Fars News Agency reported on Sunday. The projectiles are reported to have been fired from the southern parts of the city. American helicopters were dispatched on a search mission soon after the incident. No human or material losses have been reported so far. Last Sunday, three rockets were similarly fired at the base. The incident was described as the third attack to take place over a week.