Hernobyl Power plant in the U.S.S.R. (now Ukraine).

Chernobyl Power plant in the U.S.S.R. (now Ukraine).
Describe the accident a how did this happen? Explain in a few paragraphs.
Who was to blame? Did the power plant have design flaws? Explain in a few sentences.
What happened to the people/environment and the surrounding area immediately after the accident? What is the condition of the plant/ people/environment and surrounding area today?
Could this type of accident happen here in the United States?