Overview

• Thunderbirds spokesperson Maj. Krystal Jimenez said avionics and official documentation show no aircraft exceeded Mach 1 during the Aug. 15 practice.
• Residents in Lake View reported two loud blasts and lobby window damage at 3180, 3600, and 3950 N. Lake Shore Drive and 4200 N. Marine Drive.
• University of Illinois aerospace professor Matthew Clarke said video indicates sonic booms produced by localized shock waves even if overall jet speed stayed subsonic.
• The FAA referred inquiries to the Air Force, and Ald. Bennett Lawson urged filings through the city as OEMC reviews the incident.
• Inspectors are assessing the cause, rehearsals and the weekend show proceeded as scheduled, and prior demo-team incidents have triggered investigations and payouts.