Helmand province, Afghanistan
Married, 1 child
Hometown: Santa Ana
High School: Valley High (Santa Ana)
But it wasn't until after the Sept. 11 attacks, when Sim was a student at Santa Ana’s Valley High School, that he decided how he wanted to give back to the country.
"He just knew it's what he wanted to do -- we all did, him, my brother and I," said Rossy Morales, Sim's childhood neighbor. "We always talked about it, and how we were going to go fight for our country."
After graduation, he attended Orange Coast College for two semesters and then joined the Marines in 2004.
Morales, 22, said her brother, Jay, enlisted in the Marines on the same day as Sim and fought alongside him in Iraq. She later joined the Army herself and will head to Iraq in December.
Marine Cpl. Sal Loera holds Donovan Sim,
the one-year-old son of his friend, Lance Cpl. San Sim.
The two served two tours together.
Also remembered today, Aracely Gonzalez O'Malley.