Crisis in Sudan

Sudan, one of the countries Tony Horwitz visits, is a country plagued by violence. More recently the conflict in Sudan has escalated, almost to the level of genocide. Thousand of refugees live in camps while others have fled the country, looking for a safer place to live. This website is very informative as to why the genocide happened and what is being done to stop it, but I think the main issue is, why is the United Stated not getting involved? It is true that not many people are informed about the murders in Sudan, but can we really use that as an excuse?
During World War II when the United States found out that millions of Jews were being murdered, we allied with Britain and invaded the death camps. It is arguable that the United States is preoccupied with the war in Iraq and it should not have to save every country when it is on the verge of social, political, and economic collapse, but when innocent lives are being taken, shouldn’t we do something about it? The Rwandan genocide was also a large international issue that we did not get involved in. It does not make sense that we will not step in and stop the butchering of innocent African men, women, and children. Sudan is a country in crisis and yet nothing is being done by the U.S., one of the most able countries in the world, to stop it.
EJ
http://news.bbc.co.uk/1/hi/world/africa/3496731.stm