A cloud of ash billowing from Puyehue volcano near Osorno in southern Chile, 870 km south of Santiago, on June 5 2011. (Claudio Santana/AFP/Getty Images)
A cloud of ash billowing from Puyehue volcano near Osorno in southern Chile, 870 km south of Santiago, on June 5 2011. (Claudio Santana/AFP/Getty Images)