Since President Barack Obama took office, the US has forced two million people to leave the country, a number higher than under any other US president.
Some who have been deported insist that they are US citizens and that the country is the only home they have ever known.
Many risk arrest, injury or worse trying to make it back to the US.
Al Jazeera's Adam Raney reports from Tucson in the US state of Arizona.
Source: Al Jazeera