Concern and urgency were visibly etched on the face of the head of the Vatican police, Domenico Giani, after the Pope celebrated Mass in the Vatican's Church of St. Anne March 17.

Giani swiftly shouted out fresh commands for undercover guards and police to regroup as Pope Francis made a beeline toward a large cheering crowd pressing against a barricade outside the entrance into Vatican City. This came after the Pope personally greeted, often hugging, each of the approximately 200 members of the congregation right after Mass.

The Pope has preferred to walk short distances within Vatican City instead of taking a waiting sedan and has also eschewed a multi-car security escort for longer trips, preferring just one vehicle to get him to his destination. He had no qualms about stopping the open-air popemobile midride March 20 to climb out, kiss and bless a disabled adult in the throng.

The new papal approach "is perfectly fine; it's his way of doing things," Cpl. Urs Breitenmoser of the Swiss Guard told Catholic News Service.

"We are worried if there is more contact with people, because that means there's a greater possibility something can happen."

But "we have to fully adapt ourselves" to what the Pope wants, he said, and security will in no way try to prevent or dissuade him from greeting people.

The Vatican spokesman, Jesuit Father Federico Lombardi, told journalists the Pope's security detail is able to smoothly switch gears and follow the Pope's lead. It is because of their "ability and intelligence" that the papal guardians "know how to adapt and be flexible according to the Pope's manifest wishes and intentions," he said.

The 110 Swiss Guards' main duties are protecting the Pope and his residence while the Vatican's own police force, the gendarme corps, is responsible for crowd control, traffic within the Vatican and other duties within the walls of Vatican City.

Together, the hundreds of people who guard the Pope and the Vatican have tried to strike a delicate balance between providing tight professional security and a reasonable amount of access to the public.

Pope Pius XII began the practice of having "audiences outside" among the general public, Breitenmoser said. Since then, the men guarding the Pope, both in uniform and undercover, have had to develop "a system that's worked for years" of being able to provide discreet yet diligent protection, he said.

"It's wonderful to be able to experience up close" the Pope meeting and interacting with the people even though "it makes us a little nervous, which is normal," he said.

Pope Francis - A New Era