March 25, 2010
About 12 million undocumented immigrants in the United States lack fundamental rights such as education-related financial aid.
During his campaign for the presidency, Barack Obama, the US president, promised to overhaul immigration laws.
But more than a year after he came into office, US authorities have deported more than 500,000 people.
Roger Wilkinson reports from Washington, where many are calling for the US president to fulfill his pledges.
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