Pro BMX biker Rick Thorne shows us some of his tricks. Plus, we round up and review palm-sized 5 MP digital cameras, Sarah has a homeland security tip, and we build a Wi-Fi dog backpack so you can find access points while walking your dog.Part 1:\nhttp://youtube.com/watch?v=o2l_B-kY2J0\n\nPart 2:\nhttp://youtube.com/watch?v=0r-MF9Y-a-8\n\nPart 3:\nhttp://youtube.com/watch?v=g2pSV6moRXc\n\nPart 4:\nhttp://youtube.com/watch?v=9VjIu_EbaFE Albrecht, Alex, Dehererra, Diggnation, Heron, Kevin, Lane, Rick, Robert, Rose, Sarah, Savers, Screen, TechTV, The, Thorn, Yoshi