Rather than extremism, Islam itself is seen as the source of terrorist attacks after 15 years of war in the Arab states.[14] Practicing Muslims experience lack of culture representation, in which they have to shave their beards and routinely eat meals made with pork, a food source banned by Islamic customs.[14] Despite these setbacks, Muslim soldiers generally experience encouragement and camaraderie from their peers in which several have expressed openly their level of comfort while serving the military.[14] Muslim American involvement in the US military has come under increased attention after events such as the September 11 attacks terrorist attacks, 2009 Fort Hood shooting, and Khizr Khan 2016 Democratic National Convention speech.