Get your earplugs ready! To celebrate National Defense Education Day (huzzah), Shanghai will be treated to an air-raid warning test that will be audible city-wide, with the two local airports being the only exceptions. The warning will begin at 11:35am and end 28 minutes later at 12:03pm. The cacophony will include early warning ringing signals that last for three minutes each, and then six second air alerts. Certain local residents in high-rises will also be expected to participate in fire-escape drills.