[bcohen5055]

Instead of a bomb how about a warning that these vans exist? You could have a bunch of nerds leaving arduinos in Ubers around NYC. Have the arduinos measuring radiation and phoning home with any locations that are above average. At the very least it would be an interesting map to look at

[jimktrains2]

You're a much more constructive person than I! It would be interesting. Hook it up to a 360 panoramic camera to capture the source as well.