Unexpected - what is leukemia?

I found an excellent video describing leukemia and why it is so insidious.  Please view it to get a better understanding of this cancer and how it works.

This video will give all of you a better understanding of how this cancer starts and why it is different than other cancers.  It is a cancer of the blood.  There is no tumor - it starts in the bone marrow and in the past 60 years there have been a ton of advances in the research for this cancer.