Speaking to Caixin, a source close to the Lingling district public security department confirmed the letter's existence.

接近零陵区公共安全部门的人向财新网证实，信件确实存在。

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The image of the public security department consists of three parts, namely, ideal recognition system, behavioral recognition system and visual recognition system.

保卫部门形象的构成可分为三大部分：一是保卫部门的理念识别系统，二是保卫部门的行为识别系统，三是保卫部门视觉识别系统。

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The right analysis of the mass emergency in of colleges and universities, setting up the valid treatment system, are important and urgent missions that the public security department must confrant.

正确分析高校群体性突发事件的成因，建立行之有效的处置体系，是治安保卫部门迫在眉睫的重要任务。

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"Security bodies will make sure nothing illegal runs inside or outside a center, " the Public Security Department added in a statement.

CNN: STORY HIGHLIGHTS

"The issue is that we'll have to look within and see where we could find funding to sustain our programs, " said Gary Coons, chief of the Division of Homeland Security in the Indianapolis Department of Public Safety.

WSJ: Cities Rethink Security After Boston Attack

The merger is being investigated by the DOJ, the Federal Bureau of Investigation and the Department of Homeland Security for any potential impact on national security, public safety or law enforcement concerns.

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