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The recent surge of violence in Iraq has forced hundreds of thousands of Iraqis to flee their homes. "One million displaced internally is a safe estimate," according to Becca Heller, director of the Iraqi Refugee Assistance Project. The conflict is causing great concern among Iraqi communities here in the U.S.

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At St. Peter Chaldean Catholic Church in El Cajon, California, a suburb outside San Diego often referred to as Little Baghdad, parishioners say prayers and stand vigil for their loved ones in Iraq. There are some 30,000 Iraqis living in El Cajon, the majority of whom came as refugees during the war. Now, they're worried about the families they left behind.

Below, watch NBC News' Joe Fryer report.