Today is Memorial Day, and WGBH joins the nation to pay grateful tribute to those who have died while serving in the United States armed forces.

What is it really like to go to war? For millennia, only warriors could really answer that question. War is the ultimate paradox: filled with terror, pain and grief, it also brings exhilaration, and a profound sense of purpose. Going to War helps us make sense of this and get to the heart of what it's like to be a soldier in the midst of battle.

Watch Going to War tonight at 9pm on WGBH 2