"There are so many unknowns commercially, " said Scott Foraker, who heads Amgen's year-old biosimilars unit.

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Foraker said he met Fattal during a study abroad program in 2003, and the two worked together at the Aprovecho sustainable living research center in Cottage Grove, Oregon.

CNN: Clinton presses Iran for info on detained U.S. hikers

Fattal shared his friends' love of travel and learning, and was described as "fiercely intellectual" by his friend, Chris Foraker, who spoke to CNN affiliate KVAL-TV in Eugene, Oregon.

CNN: Clinton presses Iran for info on detained U.S. hikers

Cook, 25, dropped by CNN's New York offices (with his mother, Beth Foraker, in tow) to talk about keeping creative control, losing his privacy and his responsibility as Idol No. 7.

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