They are called "crypto-Jews" or "lost Jews," and in recent years they have emerged in remote places as scattered as India, Brazil, the American Southwest and here in Colombia.
They were raised as Christians but believe they have discovered hidden Jewish roots, prompting many to return to Judaism. Many say their ancestors were Sephardic Jews expelled from Spain more than 500 years ago, as the Spanish crown embarked on a systematic persecution of Jews.
It's Inauguration Day in Mexico, and President Enrique Pena Nieto inherits a country with a mixed record.
Most of Mexico is embroiled in a deadly drug war that has claimed the lives of as many as 50,000 people, but Pena Nieto is also taking over an economy that is doing surprisingly well — thanks, many say, to the outgoing head of state.