her on child, staff sergeant clay bowen, was killed in the line of duty. >> he decided when he was inh school to go into the military. he made a decision to see the recruite i said okay. and he chose infantry. i'm thinking why did you choose infantry? >> infantrymen engage in ground combat on foot, often on the front lines, making it one of the most exposed jobs in the military. this is where he grew up, a room frozen in time. >> the dark red maroon beret. they look so nice. they hold themselves so proud. i loved him in the uniform. >> he was killed in 2009 impetigo province near the pakistan border. they were patrolling when their vehicle hit a roadside bomb. he was 29 years old. for his mother, it is hard to find meaning in a 20 year long war. >> so many people are angry about it. nothing has changed. different opinions. it is too bad that it happened. no one ever thought it would go on this long. 20 years. so many killed. and i have said to myself i never thought 9/11 would kill my son. >> he's buried at the fort sam houston cemetery in san antonio. she visits his grave regularly.