I dont understand, How can someone enter illegally???

Do not say that; we do not like to here it.

It is easy to blame foreigners (both legal and illegal immigrants) for all kinds of problems. Majority of people fail to see that in over 250 years of history of this country, immigrants have done a lot of wonderful things. They are not only pickers of apples or dishwashers in restaurants but also great people who make significant contributions. A sample of immigrants strategic contribution to this country in the last 50 years:
= German scientists helped built atomic bombs that helped this country to win the WW2 against Japan.
= Israeli physicists helped designed PATRIOT missiles
= Eastern european engineers founded INTEL Corporation that created seed for computer revolution.
= India computer scientist created the first public email system that we now use for free.
= Russian rocket scien**** helped NASA put Americans on the moon.
= Scandinavian scientists created first internet browser.

Well said Jack!
Plus all the super-models from other Countries who live now in America and that nobody minds seeing them in a swin suit LOL.