Planefags.

Keep an eye out for these.

https://www.thedrive.com/the-war-zone/33136/the-curious-case-of-customs-and-border-protections-mysterious-unmarked-s-76-helicopters

AMO's "Sikorsky S-76 helicopters are a medium-range, tactical apprehension aircraft used by CBP’s Air and Marine Operations (AMO) to protect the American public from threats of terrorism and drug smuggling, and to enforce airspace security over critical venues,"