Oh, gee. Why didn't I think of that?
Are Americans so foggy that no one could improvise stop signs written in Arabic at checkpoints? So freaking stupid that that wouldn't have been the first thing they put up at checkpoints? Or maybe even after the first time somebody failed to understand they were to stop?
Bullshit to all this story about how checkpoints are so dangerous that American soldiers can be forgiven for being jumpy and overcautious about shooting into approaching civilian vehicles.