Hundreds of protesters have clashed with police in Venezuela's capital as the government has rejected opposition demands for a vote recount.
Venezuelans voted into the night on Sunday in state elections that test President Hugo Chávez's 10-year grip on power.
Rio de Janeiro's Copacabana beach erupted in samba dancing and joy on Friday after the Brazilian city won the vote to host the 2016 Olympic Games.
Venezuela's opposition has demanded the government tell "the whole truth" about the health of cancer-stricken President Hugo Chavez.
Thirty years after he first visited Brazil's Amazon to observe natural gas seeps, geologist Marcio Mello is back to fulfil what he calls his destiny.
Venezuela deployed tanks and its air and sea forces toward the Colombian border in its first major military mobilisation in a crisis with Colombia, the country's defence minister said on Wednesday. The move escalates tensions in a dispute over a Colombian weekend raid inside another of its neighbours, Ecuador.