World's 10 richest billionaires
9: Theo Albrecht ($18.8 billion). Albrecht, 86, owns and was the CEO of the Aldi Nord discount supermarket chain. In the U.S. he owns the Trader Joe's specialty grocery store chain. A reclusive man like his brother, he was kidnapped in 1971 and a $3 million ransom was paid for his release. Getty Images
