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Image #: 19172671    Syrian refugees are seen at the Al Zaatri refugee camp in the Jordanian city of Mafraq, near the border with Syria August 29, 2012. The Al Zaatri camp is one of many set up along the 86 km (53 mile) border between Jordan and Syria under the management of the United Nations refugee agency (UNHCR) and with the help of local charity groups. The pace of Syrian refugees reaching Za'atri camp in northern Jordan has doubled, with 10,200 arriving in the past week, heralding what could be a bigger mass movement,  Melissa Fleming, chief spokeswoman for the U.N. High Commissioner for Refugees (UNHCR), said. REUTERS/Ali Jarekji (JORDAN - Tags: POLITICS CIVIL UNREST)       REUTERS /ALI JAREKJI /LANDOV
Image #: 19172671    Syrian refugees are seen at the Al Zaatri refugee camp in the Jordanian city of Mafraq, near the border with Syria August 29, 2012. The Al Zaatri camp is one of many set up along the 86 km (53 mile) border between Jordan and Syria under the management of the United Nations refugee agency (UNHCR) and with the help of local charity groups. The pace of Syrian refugees reaching Za'atri camp in northern Jordan has doubled, with 10,200 arriving in the past week, heralding what could be a bigger mass movement,  Melissa Fleming, chief spokeswoman for the U.N. High Commissioner for Refugees (UNHCR), said. REUTERS/Ali Jarekji (JORDAN - Tags: POLITICS CIVIL UNREST)       REUTERS /ALI JAREKJI /LANDOV

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Syrian refugees could face catastrophe

U.N. humanitarian aid chief Valerie Amos warns of a humanitarian catastrophe among Syrian refugees.

Syrian refugees could face catastrophe

U.N. humanitarian aid chief Valerie Amos warns of a humanitarian catastrophe among Syrian refugees.