Highlights from the world of Stephen and his guests include an announcement about the Pennsylvania primary and a celebration of World Water Day. (04:37)
Stephen wants to be a biblical figure on Conservapedia, the Louvre announces its plans to install a McDonald's, and Honda introduces a unicycle of the future. (05:45)
Once wasn't enough -- Stephen pays additional tribute to the 20th anniversary of Reagan's "Tear Down This Wall" speech, with the help of karate champion Igor Dyachenko. (0:49)