A national security expert has urged the Department of Homeland Security (DHS) to elevate the national terror threat level due to escalating concerns about sleeper cells existing within the United States. This call comes in the wake of a shooting incident that investigators suggest may have links to terrorism, highlighting a broader concern that threats are not just external but also present domestically. Charles Marino, a former advisor to the DHS, emphasized the importance of recognizing and reacting to the various threats arising from these sleeper cells, which he believes have the potential to execute attacks on U.S. soil. Marino's statements were made during an appearance on "Fox & Friends First" after a series of joint U.S.-Israeli military operations that resulted in significant casualties among Iranian leadership, including the death of Ayatollah Ali Khamenei. Marino's warnings signal serious implications for national security as the geopolitical landscape continues to evolve, with potential retaliation threats stemming from the recent military actions. With the mention of sleeper cells, particular attention is being drawn towards the abilities and intentions of such groups that may already be in place within America. In light of these developments, law enforcement and intelligence agencies are reportedly operating at an elevated threat level in the U.S. Marino's insights reflect growing unease among security officials who are alerting the public and government about the risks these sleeper cells pose. The situation calls for heightened awareness and preventative measures from both citizens and authorities to mitigate potential extremist activities that may arise from these threats within the country.