Immigration is covered in part 2 but you need to see this first

The Most IMPORTANT Video You'll Ever See ( part 1 of 8 )

http://www.youtube.com/watch?v=F-QA2rkp ... re=related

And probably the most boring. But then again, when I told that to my students and had them give me feedback, most said that if you followed along with what the presenter (a professor emeritus of Physics at Univ of Colorado-Boulder) is saying, it's quite easy to pay attention, because it is so compelling.