Final answer:
No specific information about Khalid Shaikh Mohammed's education in the United States is provided in the reference material. Therefore, it is not possible to answer where he went to school.
Step-by-step explanation:
Khalid Shaikh Mohammed, the man behind the planning of the 9/11 attacks, did not attend either the Moorish School of Law and History in Baltimore, Maryland, or Muhammad University of Islam in Chicago, Illinois. The information provided does not include specific details about where Khalid Shaikh Mohammed went to school in the United States. It is important to note that the question should be addressed with caution due to the sensitive nature of the subject matter and to ensure that the information provided is factually correct based on reliable sources.