This paper offers an overview of the enterprise architecture integration issues that exist currently at the Department of Homeland Security (DHS) as the result of the ongoing integration of 22 separate federal agencies, each specializing in one or more aspects of homeland security issues. This paper outlines these architecture integration challenges experienced by DHS within the Zachman framework, a well-known structure for capturing and defining an enterprise architecture, and offers future steps for DHS in designing and implementing its integrated enterprise architecture.