Happy 25. birthday, Linux

​Linus on Linux's 25th birthday | ZDNet

Linux rules the world. Where to next? | ZDNet

Happy 100. birthday, National Park Service (!)

We’re inviting you to our 100th birthday party! - Centennial (U.S. National Park Service)

Find a Park (U.S. National Park Service)

US National Parks - Google Search

Yosemite National Park travel guide - Google

List of national parks of the United States - Wikipedia, the free encyclopedia

Amazing National Parks @ Windows Store