The document discusses several topics related to immigration in the United States, including: 1) Studies showing that most second and third generation immigrants become fluent English speakers, and that undocumented immigrants pay billions in taxes each year including to Social Security. 2) Research indicating that immigrant communities do not increase crime rates, and that on average immigrants pay more in taxes than they receive in services. 3) Statistics on the number of legal permanent residents in the US from 2001-2010, with the largest numbers coming from Asia, North America, and South America.