President and his family spend time seeing some key sights in Rio de Janeiro
US president meets in Brasilia with his Brazilian counterpart, Dilma Rousseff
His five day trip through Latin America will also take him to Chile and El Salvador
He reiterates there will be no involvement on the ground by U.S. troops.
President has ambitious agenda for his first trip to South and Central America, where he intends to step up US economic engagement
Officials say President Obama is receiving regular briefings on the issue, but is not ready to take specific action
President's spokesman says US and its partners continue to keep all options on table
Talks at White House dominated by situation in Libya
President discusses response to Libyan crisis with German Chancellor Angela Merkel
Sanctions, other steps, aimed at pressuring Libyan leader Moammar Gadhafi to stop violent crackdown on opposition protesters
US president orders national security team to prepare 'full range of options' for dealing with crisis
President meets with leaders of American tech companies, visits high-tech facilities at Intel Corporation in Oregon
White House says President Obama committed to working with Republicans and Democrats to achieve compromises on his 2012 budget
US president criticizes Iran for attacking anti-government demonstrators, urges governments throughout Middle East to avoid violence
President Obama's remarks Friday about Egypt contained strong words in support of people seeking freedom and justice round the world
President Obama's White House press secretary for the past two years, Robert Gibbs, held his last media briefing Friday
In a speech at US Chamber of Commerce, president urges business community to work with government to get nation moving
US President and other world leaders are calling for quick change in Egypt
New initiative is aimed at strengthening security by increasing coordination and sharing intelligence
US president speaks out about national political discourse, violence in Egypt during National Prayer Breakfast
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