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Argentina's President Cristina Fernandez de Kirchner cancels tax rises on farm exports, after months of protests.

Senators in Argentina reject controversial tax rises on farm exports after a marathon 16-hour debate.

Workers at Brazil's state-run oil firm Petrobras embark on a five-day stoppage, and management says output is down by 7%.

Workers at Brazil's state-run oil firm Petrobras begin a strike, raising fears of further pressure on world prices.

Argentina's lower house of Congress approves taxes on agricultural exports, which farmers have vowed to resist.

White House hopeful John McCain urges approval of a US free trade deal with Colombia as he tours the country.

The economic angst that is gripping the US in election year

South American heads of state end a regional summit with a fierce attack on the "barbarism" of EU immigration policies.

Americans gave a record $306bn to charity in 2007 but fundraisers say economic woes may hit future giving.

Farmers in Argentina lift most of the roadblocks they set up during a three-month row with the government.