A police officer calls for an immediate evacuation of the main hall of the Humboldt University minutes prior to a speech of Turkish President Abdullah Gul in Berlin, Monday, Sept. 19, 2011. Berlin police cleared the university where Turkish President Abdullah Gul was due to speak after a German news agency reported a bomb threat. (AP Photo/Markus Schreiber)

Associated Press
A police officer calls for an immediate evacuation of the main hall of the Humboldt University minutes prior to a speech of Turkish President Abdullah Gul in Berlin, Monday, Sept. 19, 2011. Berlin police cleared the university where Turkish President Abdullah Gul was due to speak after a German news agency reported a bomb threat. (AP Photo/Markus Schreiber)
A police officer calls for an immediate evacuation of the main hall of the Humboldt University minutes prior to a speech of Turkish President Abdullah Gul in Berlin, Monday, Sept. 19, 2011. Berlin police cleared the university where Turkish President Abdullah Gul was due to speak after a German news agency reported a bomb threat. (AP Photo/Markus Schreiber)
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