Tom Mc Killop, Astra Zeneca

When Sweden's Astra merged with Britain's Zeneca in April, 1999, to create the world's No. 5 drugmaker (AZN), some critics wondered whether newly appointed CEO Tom McKillop was up to the task. After all, the 30-year Zeneca veteran, a chemist with a PhD, had never run a big corporation. In fact, while growing up in Glasgow, the miner's son never figured he would become a businessman. But he has surprised the doubters--and himself.

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