On Thursday at Wrigley Field, law enforcement officials and emergency responders will be conducting a simulated "active shooter incident."

The exercises will involve Chicago's fire department, police officers, the city's emergency office and the Chicago Cubs, according to the Chicago Tribune.

#WrigleyField now- law enforcement converge outside the friendly confines for fake emergency. #Thisisjustadrill pic.twitter.com/uMToBQ0oiN

— Roseanne Tellez (@RoseanneTellez) July 14, 2016

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The drill will last from 7 a.m. to 2 p.m. local time. Officials have warned locals that simulated ammunition and flash bangs will go off during the exercises.

This is wise preparation by Chicago or a sad sign of the times, maybe both.