texas reservists and includes five sets of brothers. will and raoul hernandez, josh and daniel beans, francisco and hector vega. do you lean on each other? >> yes. >> reporter: their brotherhood eases the pressure of heading into the battlefield. >> i don't think there is anybody better to keep me safe than him. >> this will be one of the biggest struggles we go through together as brothers. >> do we worry? absolutely. you never know what's going to happen out there. we have to take care of each other because that's all we have. >> reporter: only josh and daniel beans have experienced war together before. three years ago, they road on the same street patrols in iraq. >> not many brothers are in the situation where they are both able to deploy together or even be in the military together at the same time much less be in the same unit. >> reporter: the families of the