Problems at stadiums being built or renovated in Brazil for next year's World Cup and the 2016 Olympics:
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Nov. 27, 2013: Crane crashes into 500-ton metal structure at Itaquerao Stadium in Sao Paulo, toppling it into arena's outer wall and destroying rows of seats and huge LED panel. Two workers are killed.
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May 27, 2013: Small part of roof at Arena Fonte Nova in northeastern city of Salvador collapses from weight of accumulated water from heavy rainstorm. No one injured. Stadium officials deny any structural problems in project and say collapse resulted from mistake by worker who inspected roof.