JSTARS E8-C This is an American reconnaisance aircraft. You can see the long bulge of the radar underneath the forward fuselage.
'JSTARS' is an acronym for Joint Strategic Target Attack Radar System. The aircraft is based on a Boeing 707-300 airframe and is also known as an E8-C.
(Thanks to Randy Jaquish for this info) More of:
This event (Airshow 2001) This aircraft type (jstars)