A British Airways 747 aircraft flies over roof tops as it comes into lane at Heathrow Airport in west London on February 18, 2015. Heathrow's expansion plan to build a third runway is backed by trade unions, airlines and businesses, but opposed by many residents, British media report. London's Heathrow is Europe's busiest in terms of passenger numbers, and the world's busiest for international passenger traffic. AFP PHOTO / JUSTIN TALLIS / AFP PHOTO / Justin TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
