Tesla is quite a big company now.
I use there bulbs and ignition coils on motorcycles. xtremely reliable.
I remember the Harrp project as well. Sadam was trying a similar thing with his super gun.
All based on the German V3 (or Condon Gun), which itself, was based on an English Tudor period 1500's multi-chambered long range shore battery gun experiments.
Definately worth a bookmark!!