The new warning says recent attacks have occurred hundreds of miles off the coast, suggesting that pirates are using more "mother ships" -- a practice of using bigger boats with longer range to launch smaller pirate ships from farther out to sea, according to Pentagon officials.

CNN: As piracy surges, U.S. warns of dangers off Somali coast

Mr. Gates, whose brother, Paul, is the chairman of dentistry at a New York hospital, says his genetic sleuthing has inched him closer to fulfilling his late mother's wish that both her sons would be doctors.

WSJ: Henry Louis Gates Jr. on 'Finding Your Roots'