Necker Island (British Virgin Islands) world, the challenge begins at the annual Consumer Electronics Show in Las Vegas with the top 10 new innovations progressing to the finals at Necker Island where Branson joins the judging panel along with technology figures and investors from Silicon Valley. The Necker Cup, an exhibition tennis tournament held at the end of the tennis season, has been held on the island annually since 2012. In February 2017, former U.S. President Barack Obama and his wife Michelle visited Necker as guests of Sir Richard Branson. On August 22, 2011, The Great House burned down in a blaze believed to be
Mosquito Island located on the west side of Gorda Sound adjacent to Virgin Gorda and near Necker Island, which is also owned by Branson. Barack Obama visited the island in February 2017, and learned how to kiteboard there, shortly after his retirement as President of the United States. On old nautical charts of the British Virgin Islands, the island's name is often spelled "Moskito" (possibly as an older spelling of "mosquito" - older versions of the English language did make greater use of etymological spelling). Although modern charts usually spell the island "Mosquito" Island, and the Land Registry of the British Virgin