VCS focuses on four primary program areas: national security, civil liberties, energy policy and veterans healthcare and benefits. Activities have included large veterans' sign-on letters urging caution to the President before the 2003 invasion of Iraq and a lawsuit against the government seeking documents related to torture at the Abu Ghraib prison and the Guantanamo Bay detention camp. In addition, VCS has given frequent testimony before Congress about the need for mandatory full funding for U.S. Department of Veterans Affairs (VA) healthcare, the VA's broken disability claims process, and the VA's need for increased capacity for dealing with Gulf War Illness, traumatic brain injury (TBI), and post-traumatic stress disorder (PTSD) and mental health patients.