I think you have to look at their standing orders which are to fire on any vehicle attempting to run the checkpoint until it stops. They did mostly aim at the engine block first. If they had wanted her dead for some reason, they certainly had the oportunity to make it so after the vehicle was stopped. Bombers often load the vehicles between checkpoints, so the fact that they had passed other checkpoints was moot. 700 yards is 2100 feet..(nearly a mile?) from the airport? I am metricly challenged, so someone else can convert it more acurately.
http://www.signonsandiego.com/news/world/iraq/20040507-0402-denmark-iraq-shooting.html
COPENHAGEN, Denmark – Danish soldiers killed an Iraqi man after the truck he was driving didn't slow down as it approached their checkpoint, the military said Friday.......A spokesman for the Army Operational Command said the soldiers fired warning shots at the truck to make it slow down. When it didn't, they opened fire, killing the driver. A passenger in the truck was wounded and taken into custody.
http://www.guardian.co.uk/Iraq/Story/0,2763,965111,00.html
Two US soldiers were killed and nine injured yesterday in an attack on an army checkpoint in the troubled Iraqi town of Falluja.......
......In yesterday's clash the troops came under attack on a road leading into the town. Gunmen in two cars drove up to checkpoint only hours after it had been set up late on Monday night and opened fire on the troops.
http://www.buzzle.com/editorials/4-4-2003-38612.asp
The Arabic TV station al-Jazeera broadcast videos of two Iraqi women vowing to carry out suicide attacks yesterday after three American special forces soldiers and two Iraqis were killed when a car bomb exploded at a checkpoint in central Iraq.
A pregnant Iraqi woman stepped out of the car as it approached the checkpoint and began "screaming in fear", officers at US central command in Qatar said.
Moments later the car exploded, killing three soldiers, the pregnant woman and the driver. Two American soldiers were injured.
I could post dozens of checkpoint killings of Iraqis and soldiers, but you get the idea. It is what the terrs want.