Hey! My mother is an immigrant from saudi arabia. Do you know anyone who is an immigrant? Immigration to the US is the movement of individuals who are not natives.  
My sister's boyfriend is an immigrant from Russia.
Cool! Immigration has been a big source of population growth and change in the culture for the US. It's a major change for the people coming to the US as well.
Yes. I cannot imagine how it must feel to move to a new country.
I know, and apparently the US has a bigger immigrant population than any other place in the world. That's pretty amazing!
That is amazing. I never knew.
Also before 1965 there were policies like "national origins formula" that put limits on the amount of immigration.
What changed in 1965?