Blackhawks Circle Low Through Chicago Skies as Secret Service Releases Security Details

Blackhawks Circle Low Through Chicago Skies as Secret Service Releases Security Details: "Chicago - Blackhawks and A/MH-6 Little Bird helicopters used by special forces circling low through downtown Chicago skies made for a scary scene along the Chicago River, as they rattled windows flying among the city's skyscrapers. The training exercise comes as the city found out some of the details of what the Secret Service wants for security at next month's summit at McCormick Place."