From high in the sky to beneath the sea, Skype is going where it's never gone before! For the very first time, Navy Cmdr. John Sager logs on from inside a submarine.

"We're off the coast of Hawaii at periscope depth, Skyping off of our periscope," he says. "This is the first for any submarine. We're pretty proud that we'll be able to do this for you today."

Cmdr. Sager is the commander of the USS Louisville, affectionately known as "the slugger." For months at a time, Cmdr. Sager lives in this submarine with 146 other men. "Right now we're 60 feet—so about six stories—underwater," he says.