Poll: One-third of veterans say Iraq, Afghanistan wars weren't worth fighting

An almost equal number -- 34 percent -- said both wars have been worth it. When asked about the wars separately, half of post-9/11 veterans said the Afghanistan war was worth it and 44 percent said so for the Iraq war.

The poll found that 59 percent of post-9/11 veterans supported the military's strategy of nation-building in Iraq and Afghanistan and 86 percent of veterans of all eras said they support unmanned drone attacks.

The poll also asked veterans about their lives returning from wars. Forty-four percent of post-9/11 veterans said they had trouble readjusting to civilian life and 37 percent said they thought they suffered from post-traumatic stress, whether diagnosed or not. Only 16 percent of veterans who served before 9/11 said they suffered from PTSD, according to the poll.

The poll included responses from 1,134 veterans who served before Sept. 11, 2001 and 712 who served after the attacks.