This is the reconnaissance version of the Stryker - the "HORSE" on which the scout squads of the 1st and 2nd Squadrons are mounted.  (Actually there another one parked on the other side - only half of the visible antennae belong to this one.)
 
 
 
 

More information about the Stryker family of light combat vehicles and the two Congressional Medal of Honor winner for whom it is attached.)