The "concrete" barricades at the checkpoints are actually made out of wood and only weigh a few pounds.
The original script called for a Red Cross insignia on Grace's jeep. After doing some research, the art department discovered that in Palestine they use the Red Crescent, resulting in the decal for the jeep and lines between Ari and David to be changed.
Crew consisted of students in the Grand Valley State University film & video department.