Airforce
The only reason they don't have that button is they share the Space station with foreign nations. To do anything except create seismic conditions like in Haiti and Fukishima is that to use the thing requires them to either have straight line access (Space based Initiative) or single bounce range. Once the signal bounces over one time it will not have the power or the phase shift needed to modulate.
In one story I heard on a talk panel to achieve the best results like in Haiti and Fukishima they need to place a resonating device into the rock.