I did a sort of internship at Los Alamos which involved building some drones. A year or two later I got a call from my advisor there, out of the blue asking me if I had anything immediately available that could do recon underground effectively. I didn't really, so I declined. I asked what they needed it for and he said it would be easier if I got the info from the news. That was kinda terrifying ... turned out to be this incident.
Internship started as this thing: https://youtu.be/hq03MsP1MPI?si=lVpDMLqRN4nfwMiA really great experience.