Good morning on this nebulous Friday.

Perhaps you saw it this week at Columbus Circle or in Lower Manhattan, or on the television news.

It’s the truck with the big white sphere that has been collecting and carrying away the explosive devices that have been delivered in manila envelopes to critics of President Trump.

But where does it go? And what’s up with the globular container?

The big white sphere is known as a Total Containment Vessel, or T.C.V.

Explosives are loaded inside, usually with the help of robots, and driven to a location where they can be safely deactivated or blown up by a bomb squad. The explosives found at Columbus Circle and in TriBeCa this week were taken to a police facility in Rodman’s Neck, a peninsula in the Bronx, according to the police.