Police Commissioner William Bratton stressed Sunday that collaboration between the NYPD and counterparts overseas is key to keeping New Yorkers safe from terror attacks.

“The world is getting smaller,” he said.

In a separate interview for the same 970 AM radio program, Democratic presidential candidate Hillary Clinton also underscored the importance of international relationships. Other countries “rely on the United States to make the tough decisions in the world,” she told host John Catsimatidis. Failure to lead globally will mean opening the door to “bad actors,” she said.

Bratton spoke about his recent trip with his counterterrorism chief to Qatar, where he signed a memorandum of agreement to share information, technology and training.

He told Catsimatidis that similar relationships with authorities in Belgium led the NYPD to immediately deploy hundreds of police into the city’s subway system after the airport and a train station in Brussels were bombed in late March.

“The world is getting smaller all the time because of technology,” Bratton said. “Relationships between police departments around the world are getting closer. That’s a good thing because criminals today don’t operate just in one country.”

The NYPD has 13 detectives assigned overseas to build partnerships and provide the department with “intimate” and “behind-the-scenes” information as quickly as possible, Bratton said.

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Clinton, former U.S. secretary of state and front-runner in the Democratic race for the White House, said the country’s next president must demonstrate leadership to the world.

The United States would otherwise “leave the door open to bad actors, who are either states or criminal or terror networks,” she said.

“People are worried that we’re not going to be strong at home and leading around the world,” Clinton told Catsimatidis. “First and foremost, we’ve got to demonstrate we can get things done and we can bring our country together.”