International Affairs and Conflict Resolution - Recommend

Hello everyone;

I'm looking for your recommendations on very good, reputable universities in the U.S that offer quality GRADUATE PROGRAMS on:

International Affairs
Conflict Resolution and Peace Building

or similar fields.

I would like to know your own recommendations of reputable universities around the United States which you know or heard about or even been through. My range of choices is open to all states. What I care about is the reputation and the quality of education.

Thank you!