Shaped charge (anyone can copy the google-able designs) and basic explosive compound that anyone can make / terrorists make all the time overseas. Simple ingredients, super dangerous. Ignited with an Arduino / micro-controller. Dude was already dead before the bomb went off, likely pills (if they didn't find a molten gun).
Or (Puts on tinfoil hat)
He used agency provided explosive compounds
He used agency provided equipment, timing equipment, and pre-made shaped charge forms (thank you spooks)
And they bypassed all that by having a missile skim the building across the way and blow up right inside the RV.
Psh, no EMP.
Shaped charge (anyone can copy the google-able designs) and basic explosive compound that anyone can make / terrorists make all the time overseas. Simple ingredients, super dangerous. Ignited with an Arduino / micro-controller. Dude was already dead before the bomb went off, likely pills (if they didn't find a molten gun).
Or (Puts on tinfoil hat)