In an eventful week in Latin America, Mexico City residents got to see a "sun halo," a weather phenomenon caused by ice crystals in the upper atmosphere, while in western Mexico at least 43 people died in what authorities described as a three-hour gun battle between federal forces and suspected drug gang gunmen at a ranch. The quarterfinals of soccer's Copa Libertadores were in full swing with Dairon Mosquera of Colombia's Independiente Santa Fe moving his team a victory in a first-leg game, while Ramiro Funes Mori of Argentina's River Plate struggled against Brazil's Cruzeiro, with River losing the first game.