Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. UN: Ability to Get Lifesaving Aid to 4 Million Syrians at Risk Margaret Besheer UNITED NATIONS - The U.N. humanitarian chief is urging the Security Council to authorize a one-year extension of cross-border aid operations into Syria, warning there is no backup plan for reachingmillions of vulnerable civilians without it. "Cross-border operations provide assistance that cannot otherwise reach those in need," Mark Lowcock toldtheSecurity Council president, U.S. Ambassador Kelly Craft, in the letter dated December17 and seen by VOA. "The United Nations does not have an alternative means of reaching 2.7 million people in need in northwest Syria." Lowcock said another 1.3 million people in the northeast receive lifesaving aid through a border crossing with Iraq. In all, about 4 million of the 11.7 million people in need of humanitarian assistance in war-torn Syria are reached through four crossing points from Turkey, Iraq and Jordan. "Without the cross-border operation, we would see an immediate end of aid supporting millions of civilians," he wrote. Russia's U.N. ambassador said Wednesday that the U.N.'s continued call for using the four border crossings, and its support for an additional one that Turkey has proposed, didnot reflect "the realities." .