Immigration activists organized a national action day on August 16 to demand an end to Secure Communities, the immigration enforcement program that the Obama administration plans to deploy nationwide by 2013.

Argentine President Cristina Fernández de Kirchner won the country’s first primary election handily on Sunday, taking more than half the votes. Facing a splintered opposition, it looks increasingly likely that she could win October’s presidential election in the first round.

Nervousness in world markets has cast a shadow over Latin America’s economies. But unlike previous crises, many analysts view the region as a motor for future growth, even as advanced economies struggle.