The photo shows quite clearly that the no. 1 engine is intact and that the missile hit roughly halfway from the engine to the wingtip. The thingy between the damage and the engine is the flap track fairing, common to all of these aircraft, and is definitely not an antimissile device. It is believed that the 2 main hydraulic systems out of 3 were lost, as well as serious aerodynamic damage. This meant that neither the flaps nor the speedbrakes were available and an over-speed landing was inevitable (about 45 knots faster at touchdown- reference)- hence the over-run. Informed speculation on the web suggests that the plane was also overweight for landing, as it is unlikely that anyone would have risked holding to dump fuel during the SAM threat.