Which of the following responsibilities does the Coast Guard NOT perform?

The Coast Guard plays a vital role in numerous maritime responsibilities, but the management of nuclear weapons falls outside its purview. This function is primarily the responsibility of the Department of Defense and specialized agencies like the Department of Energy, which oversee the security and management of nuclear materials and weapons.

In contrast, the Coast Guard is actively engaged in port security to protect infrastructure and prevent unlawful activities. It also conducts law enforcement operations within US territorial waters to enforce maritime law and ensure safety. Additionally, search and rescue operations are a cornerstone of the Coast Guard's mission, as they respond to distress calls and provide assistance to those in peril at sea.