WATCH: Kim Jong Un’s security: ‘Not even an ant can pass through’

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When Pyongyang’s leader Kim Jong Un came down the steps towards the inter-Korean border Friday he was escorted by a phalanx of bodyguards carefully chosen for their fitness, marksmanship, martial arts skills and even looks.

Men in sharp suits and matching blue and white striped ties fanned out ahead of and around Kim as he approached the Military Demarcation Line for a historic handshake with his Southern counterpart Moon Jae-in.

Some of the men had bulging pockets. All sported red North Korean lapel badges and the curly-wired earpieces beloved of the US Secret Service.

Human shield

As the leader left after the morning session of talks, a dozen of them were given a pre-lunch work-out, jogging alongside and behind Kim’s official car to form a human shield, ties flapping as they ran.

North Korea is one of the world’s most tightly-controlled societies, but even so security for its leader is iron-clad.

Foreigners attending any event where Kim will be present must go through hours of security procedures beforehand, and surrender all electronics, including phones.

The Guard Command, the military unit tasked with ensuring the safety of the leadership, is an elite institution close to the center of North Korean power -- it provides the centerpiece display of the annual Kimjongilia and Kimilsungia flower festivals in Pyongyang to honor Kim’s father and grandfather.

Ri Yong Guk, a defector from the North who served on a security detail for Kim Jong Il, wrote in a 2013 memoir that as many as six different layers of security guards protected the leader on trips to the countryside to inspect military units, plants or farms.

“It is one of the world’s tightest security blankets through which even a single ant would find it hard to go,” he wrote.

The arrangements for the current leader are reportedly even tighter, and during a military parade marking the 70th anniversary of the foundation of its regular armed forces in February, Pyongyang paraded three kinds of security units dedicated to protecting Kim’s life.

Kim was repeatedly seen accompanied by a stout military general in uniform with a holstered gun.