Dear Ageless Traveler, Two milestones occurred within days of each other, giving me pause. Mel Brooks turned 100, and the United States turned 250. That means Mel has lived through more than one-third of our nation's entire history. It struck me that we are still a remarkably young country...and that many of us, along with even more of our children and grandchildren, will witness an extraordinary amount of history yet to come. Visiting Richmond, Virginia, last week sharpened my awareness of...