Boeing just patented a force field.
Its called "method and system for shockwave attenuation via electromagnetic arc."
This is like bad ass news!
You can see the patent here.
Its a lot of math, but if you head down to the summary section you'll see the babble about creating a field around the "protected asset" that reacts to a source of energy (bomb blast) by creating heat that deflects or absorbs it or some such.