Her respect for Woodrow Wilson's vision overcame her strong antiwar sentiments and she and Dickerman both became active in the Red Cross. As Dickerman later recounted, they "really believed this was a war to end wars and make the world safe for democracy." In 1918, they both traveled to London to assist the women-staffed Endell Street Military Hospital and "scrub floors or perform whatever other chores were required." Cook would, with less than two weeks training, begin to make artificial limbs for soldiers that had lost an arm or a leg.