The Presidio, previously a military base in San Francisco, is now a national park. It sits in the middle of San Francisco on some of the most valuable real estates in the United States. When it created the park, Congress required that it rehabilitate the aging buildings and be self-sufficient within a decade or so, or the land would be sold off to developers. To achieve self-sufficiency, the land was leased to private firms—Lucasfilm has built a large digital animation studio, and other firms have undertaken similar projects. These projects all must maintain the general character of the park and generate rent that will cover the park’s expenses in the future. Would this privatization approach work with most of America’s other national parks? Why or why not?