Chris Hagerman: Two Face: The Flip Side roller coaster at Six Flags America. CC 3.0 Tactics, Strategies, Plans & Practice I've been researching a lot lately, but not for my book on my mother's McBees, or even my "52 Ancestor" project . Those are not forgotten; just on the back burner for now. Instead, I decided to fill a hole in the tree, which has our grandchild as the base person. When we're all gone, it will be his. Because I knew very little about his mother's father's line, I decided to tackle that. It is 100% Russian Jews and we are using DNA as a major clue to families long separated by migration and other historical events. But there is   a major roadblock: endogamy . Endogamy is  marriage within a specific group as required by custom or law . Jews in the Russian Empire were confined to the "Pale of Settlement" and could not live in cities or large towns. As a result, intermarriage normal in small communities was magnified, and lasted...