HONOLULU -- Fort Hood is the biggest military base in the world. It is the temporary home to as many as 65,000 people. So, word of Thursday's shooting caused fear all around the country.

A military mental health doctor facing deployment overseas opened fire at the Fort Hood Army post on Thursday, setting off on a rampage that killed 11 other people and left 31 wounded, officials said. (Read more about the shooting.)

A U.S. Air Force sergeant from Hawaii now stationed at Fort Hood talked to KITV about the attack.

"I was like 'holy crap' it was unbelievable I never thought that this would ever happen to Fort Hood. We knew it was possible," Staff Sgt. Alex Pruner said. "We always train for terrorist attack on your home base and all that, but we never thought that it would actually happen."

Pruner, a 2002 graduate of Moanalua High School, said he had just left the base when he got a text about the shooting.

"As soon as we found out we started making calls to every single guy in our unit," he said. "Until we get every single person on the phone just to make sure that they are OK. That was a big relief."

Pruner said he is sad about the families of the soldiers killed and wounded on Thursday and also for those who will have to be deployed to Iraq as replacements.