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Manzano, shown above with Rosita — a bilingual Muppet from Mexico — recently announced that she will be retiring from Sesame Street after 44 years. Richard Termine/Sesame Workshop hide caption

itoggle caption Richard Termine/Sesame Workshop

U.S. Air Force F-22 Raptors are seen parked at Kadena Air Base on the island of Okinawa in Japan. The U.S. military established a presence on Okinawa during World War II. Yoshikazu Tsuno/AFP/Getty Images hide caption

itoggle caption Yoshikazu Tsuno/AFP/Getty Images

A row of Google self-driving Lexus cars at a Google event in Mountain View, Calif. The cars use sensors and computing power to maneuver around traffic. Eric Risberg/AP hide caption

itoggle caption Eric Risberg/AP