The University of Chicago is a private, non-profit research university in Chicago, Illinois.The university is composed of the College, various graduate programs and interdisciplinary committees organized into five academic research divisions and seven professional schools. Beyond the arts and sciences, Chicago is also well known for its professional schools, which include the Pritzker School of Medicine, the Booth School of Business, the Law School, the School of Social Service Administration, the Harris School of Public Policy Studies, the Divinity School and the Graham School of Continuing Liberal and Professional Studies. The university currently enrolls 5,971 undergraduate students, and 16,016 students overall. University of Chicago scholars have played a major role in the development of many academic disciplines, including sociology, law, economics, literary criticism, religion and the behavioralism school of political science. Chicago's physics department and the Met Lab helped develop the world's first man-made, self-sustaining nuclear reaction (Chicago Pile-1) beneath the viewing stands of university's Stagg Field, a key part of the classified Manhattan Project effort of World War II. The university research efforts include administration of Fermi National Accelerator Laboratory and Argonne National Laboratory, as well as the Marine Biological Laboratory. The university is also home to the University of Chicago Press, the largest university press in the United States With an estimated completion date of 2021, the Barack Obama Presidential Center will be housed at the university and include both the Obama presidential library and offices of the Obama Foundation.The University of Chicago has many prominent alumni, faculty members and researchers. 97 Nobel laureates have been affiliated with the university as professors, students, faculty, or staff, making it a university with one of the highest concentrations of Nobel laureates in the world. Similarly, 34 faculty members and 17 alumni have been awarded the MacArthur "Genius Grant". In addition, Chicago's alumni and faculty include 53 Rhodes Scholars, 25 Marshall Scholars, 9 Fields Medalists, 4 Turing Award Winners, 24 Pulitzer Prize winners, 20 National Humanities Medalists, 16 billionaire graduates and a plethora of members of the United States Congress and heads of state of countries all over the world.