I received two registered letters from Argentina today. One had been intercepted by the Department of Homeland Security, opened, and resealed with a green tape with EXAMINED and the DHS logo. I had not seen a cover with this tape in several years, and was surprised to see it in use. And pleased.
Ironically, the registered letter carried two World War One censored covers handled at the Key West FL censor station.
Front...

Reverse...

Another anomaly was that each envelope had been diagonally clipped on three corners. On the example shown, two corners are under the green tape.
I have seen such treatment on 19th century fumigated mail, but not on contemporary mail. Any thoughts?