First of all: Remember.
Second, remember that this huge intelligence apparatus we’ve erected in the 70 years since, was to protect us from enduring another surprise attack — another Pearl Harbor.
And then remember the Korean War, launched with a surprise attack. And then remember 9/11, another surprise attack.
There is no safety this side of the grave. Sometimes, you get caught with your pants down. The important thing is to keep your wits and your resolve after it happens.