Loop evacuation part of nationwide drill

September 11, 2009 (CHICAGO) About 3,000 workers at the CNA Building, 333 S. Wabash, evacuated the 44-story building Friday morning. It was part of the nationwide "Drill Down for Safety" program, which teaches how people should communicate during an emergency.

In addition to drills, the program also focuses on the use of social web sites like Facebook and Twitter, as well as text messaging to get out the word during an emergency.

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