Question: Most people assume that your income needs will remain constant throughout your retirement years. But my wife and I plan to retire early and do a lot of international travel and volunteer work while we're still young. I can't see us continuing the same travel schedule in our late 70s as in our late 50s. So wouldn't it be safe to assume that our income needs will go down as we get further into retirement? How should we plan for that? --Brad, Arlington, Virginia

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