A Second Knock at the Door is a documentary on friendly fire in Iraq and Afghanistan.
[1][2] The film follows military families after they are told their family member died in a "fratricide" incident.
[3] All the families profiled in the film only learned their family member was killed by a comrade, not an enemy, months after they first learned of their death.
[4] Director Christopher Grimes has described being inspired by the alleged coverup of former sport star Pat Tillman being killed by his comrades.
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