A child dances on an installation of a musical staircase designed like a piano at a train station in Osasco, 28 km (17 miles) west of Sao Paulo, Jan 10, 2013. Out of 42 steps, 34 have been fitted with "piano keys" that activate when stepped on at the station's flight of stairs.[Photo/Agencies]

President of Afghanistan Hamid Karzai (Center, L) sits down to dinner with US Secretary of State Hillary Clinton (3rd R) and Defense Secretary Leon Panetta (4th R) at the State Department in Washington, Jan 10, 2013.[Photo/Agencies]