Harrier II jump jet silhouetted against a sunlit sea on the deck of an aircraft carrier. The missiles mounted on its wings are examples of advanced smart weapons. Missiles such as these use laser targeting, which is dependent on the use of rare earth elements such as yttrium. Other rare earth elements used in missiles include neodymium and samarium. Photographed in August 2005, on the Italian aircraft carrier Giuseppe Garibaldi (C551).