Vietnamese victims of Agent Orange received little encouragement…when they sought Monday to reinstate their claim that U.S. companies committed war crimes by making the toxic chemical defoliant available for use in the Vietnam War…[L]awyers for the companies and the U.S. government [argued] that there was no evil intent when Agent Orange was used…Agent Orange has been linked to cancer, diabetes and birth defects among Vietnamese soldiers and civilians and American veterans…An attorney…[for] Monsanto…Dow Chemical…and more than a dozen other companies said they were following the instructions of U.S. presidents and Congress during wartime. "Even an international tribunal would not entertain these claims," said the attorney…