Alpha Company, a National Guard unit based in Northeast Philadelphia, drew its roster from across the region. Six members were killed during the nearly 11 months that Alpha spent in Iraq in 2004 and 2005. The 131 survivors are police officers and college students, construction workers and drug store clerks. More than two years after coming home, many are still struggling to get their lives back in order and to sort out the meaning of their sacrifice. Nearly half have been treated for post-traumatic stress disorder (PTSD). Yet many say theyâ€˜d go back to Iraq if asked. Theyâ€˜d do it for their buddies.