On flight-trackers you can see a balloon right now flying over New Jersey:

• https://www.flightradar24.com/HBAL714/3865995b

• https://globe.adsbexchange.com/?icao=a2680b

It's flight number HBAL714 can be traced back to to Loon LLC - a subsidiary of Alphabet Inc!

The project was run from 2011 - 2021: https://en.wikipedia.org/wiki/Loon_LLC