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Global Citizen, which organizes charity musical festivals and is producing the halftime shows for FIFA, quickly learned some lessons for next summer, when 48 nations compete throughout the United States, Canada and Mexico. Hugh Evans, Global Citizen’s chief executive, said it must keep the performers cooler (temperatures were over 80 degrees) and improve the exposure of cameras because of the sun. But he was pleased overall, shedding a tear after watching the show.
