Patriotism was soaked to the undies on Tuesday as hundreds of VIPs in cushioned chairs and hundreds more seated on blankets or standing at attention braved the rain to line the lush green field at the Iwo Jima Memorial in Arilngton, Va. It was the Marine Corps Sunset Parade, a glorious public pageant of music, colors and military precision that takes place every Tuesday during the summer. It wasn’t raining the whole time. It started slowly then stayed steady for about 20 minutes as umbrellas popped up all around. After 10 minutes everyone was totally drenched. A man in his…