There has been no aircraft carrier sailing in the entire Atlantic for 24 consecutive months.

In recent events, the presence of just one attack nuclear submarine and a 4000-ton frigate has put the United States Northern Command (USNORTHCOM) into a state of extreme tension.

Various military aircraft have been active in the waters near Florida, resembling a disturbed hornet's nest.

Some might question: Isn't the Florida Peninsula in the southeasternmost part of the continental United States?

Why would this situation cause such anxiety for USNORTHCOM? In fact, such questions reveal a lack of understanding about the United States' longstanding confidence and its global theater setup.

The U.S. theater setup extends far beyond its mainland or adjacent regions; it covers the entire globe.

For instance, the Pacific Command's jurisdiction stretches from the Red Sea to Hawaii, while USNORTHCOM is responsible for defending the entire North American continent, from the Panama Canal to Greenland.

Thus, despite Florida appearing to have limited defense capabilities, its defense responsibility falls under USNORTHCOM's jurisdiction.

Although the small fleet of this submarine and frigate has returned north, they have stirred up a new disturbance near the British Isles. Similar to the situation in Florida, local defenses there also seem insufficient.

If these two vessels were to launch supersonic missiles at major cities in the United States or the United Kingdom, both countries would struggle to defend against them, only passively accepting the fact that their core cities have been bombed since World War II.

One major reason for this chaotic situation is that both global observers and defense policymakers and executors in the United States and the United Kingdom have seriously overlooked a fundamental fact: there has been no duty carrier in the entire Atlantic for the past two years.

Duty carriers not only refer to the Nimitz and Ford class carriers of the United States, but also include France's Charles de Gaulle and two Queen class carriers of Britain, as well as all other large and medium-sized carriers of other countries.

Since the Ford-class first crossed the Atlantic three years ago, there have been no fully equipped Nimitz-class carriers deployed specifically in the Atlantic.

After training on the North American coast three years ago, the Queen-class carriers have not gone on their second trans-Atlantic journey, and have remained at Portsmouth Harbor together with Prince-class carriers.

Charles de Gaulle has been under repair and has only been active in the Mediterranean most of the time, and does not easily enter the turbulent Biscay Bay.

Kuznetsov-class carrier has not been in action for many years and is unlikely to head south easily.

If the Kuznetsov heads to Cuba this time, its influence will be even greater.

As of late June, what are the major carriers busy with?

Reagan is currently on "vacation" in Guam; Roosevelt has just arrived in Pacific military exercises.

Lincoln was briefly repaired in San Diego;

Washington is near Chile in South America, evidently preparing to return to the mainland for repairs;

The Nimitz-class carrier has just been overhauled and is no longer suitable for use.

Truman is recovering in the United States. The Bush has never been operational; Ford is about to be repaired shortly after leaving the port; and Stanislavski is refueling.

Eisenhower is cruising in the Middle East. Each carrier is busy on its own, and the Atlantic has become a free passage for foreign fleets.

In this context, the appearance of an attacking nuclear submarine and a frigate is enough to make the defense systems of the United States and the United Kingdom nervous.

Apparently, the lack of duty carriers and emergency response capabilities makes the defense lines of these superpowers look vulnerable.

This series of events not only exposes the emergency shortcomings of the Northern Command, but also highlights the defense loopholes of the United States and the United Kingdom in the Atlantic.

If the strategy is not adjusted in time and defense deployments are not enhanced, similar tense situations may recur, even causing greater security risks.