[Kartographer]

Same for Boeing who built it?

[RayChuang88]

If I remember correctly, the USAF actually did some operational tests of the so-called EMP bomb in Iraq during the 2003 invasion and found it less effective than originally thought. In short, if you want to really knock out the power grid, you'll need a powerful nuclear warhead detonated at least 130 km (81 miles) above the ground; this is why I think the Russians kept the old R-36 (SS-9 Scarp) ICBM's much longer than originally thought because the 20 MT warhead detonated about 500 km (310 miles) above the center of the USA could cause enormous EMP damage.