Half siblings definitely looks like a good possibility--the cousins look like cousins, the aunt looks like an aunt, and the suspected half sibling looks like a half sibling--all of those people came up in the range you'd expect to see.
Network President Jenny LeFevre, Agent Orange Victims and Widows Support Network, attributes more than 250,000 deaths to Agent Orange, a toxic herbicide the U.S. military sprayed over Vietnam from 1962 to 1971.
Agent Orange Agent Orange is a toxic chemical herbicide that was used from about 1965 â 1970 in the Vietnam War. It was one of the main mixtures used during Operation Ranch Hand. Operation Ranch Hand was intended to deprive Vietnamese farmers and guerilla fighters of clean food and water in hopes they would relocate to areas more heavily controlled by the U.S.