At dusk, several unmarked white buses unload a few hundred people and children who board these white unmarked jets. They leave and return empty within 24 hours. This is a daily occurrence. Harlingen (HRL) is located 20 miles from the Los Tomates bridge in Los Indios, Texas on the Rio Grande river. These jets do not have tail numbers or any other ID marks on them. How can these jets operate legally in the US?
The airline is “iAero Airways” previously known as “Swift Air”. It is also a major contractor for U.S. Immigration and Customs Enforcement, operating many of the agency's deportation flights as well as flights transporting detainees between immigration detention facilities within the United States.
In this photo, the tail number is clearly visible.
No US-registered civilian aircraft can operate legally in the USA without an N-number. A better picture will reveal it.
The questions of who these people are, where they are going, and whether or not this whole process is legal is best referred to another forum than this one.