This is a serious holiday coming up, and not because of the Indy 500 or the unofficial opening of summer. We’ll be back with a full lineup for Tuesday, and in the best news the proudly demented Al Gore has had since the time Lenin’s admirer Armand Hammer helped make his family rich, Enemy Central has decided to extend the ex-veep creep’s eligibility for a grand Enemy of the Week prize another week. Nothing will prevent our weekend from getting off to a glorious start, not Al Gore, not even a spot of stormy weather. Just how glorious? As we type, the view from ninth-floor windows reveals a golden rainbow ending right atop a northeast corner of the Pentagon — and a Memorial Bridge aglow in white light. Unlike an Al Gore, our capital sure can rise to the occasion.