U.S. President Barack Obama bows to "Asimo" the robot while visiting Miraikan in Tokyo

U.S. President Barack Obama (2nd L) bows to “Asimo” the robot while visiting Miraikan or the National Museum of Emerging Science and Innovation, in Tokyo, April 24, 2014. Obama assured ally Japan on Thursday that Washington was committed to its defence, including of tiny isles at the heart of a row with China, but denied he had drawn any new “red line” and urged peaceful dialogue over the islands. REUTERS/Larry Downing (JAPAN – Tags: POLITICS SCIENCE TECHNOLOGY TPX IMAGES OF THE DAY)