Colonel Peck said he had learned this only five days before the hearing.
Even so, Colonel Peck said, he would actively fight any effort by his son to join the military.
Colonel Peck learned of his son's sexual orientation five days before testifying.
Colonel Peck and Scott's mother divorced when he was 6 years old.
Colonel Peck said the military forces needed some latitude to do their job.
"It was a mistake on our part," Colonel Peck said.
Colonel Peck said a second mine was found near the vehicle.
Colonel Peck said they had been released by late afternoon.
That will save $3 million in lease payments over three years, Colonel Peck said.
The other two dead were thought to be passengers, Colonel Peck said.