Food and Drug Administration (FDA) Commissioner Margaret A. Hamburg testifies on Capitol Hill in Washington, Wednesday, Nov. 14, 2012, before the House Energy subcommittee on Oversight and Investigations hearing on the Fungal Meningitis Outbreak. (AP Photo/Susan Walsh)

Associated Press
Food and Drug Administration (FDA) Commissioner Margaret A. Hamburg testifies on Capitol Hill in Washington, Wednesday, Nov. 14, 2012, before the House Energy subcommittee on Oversight and Investigations hearing on the Fungal Meningitis Outbreak. (AP Photo/Susan Walsh)
Food and Drug Administration (FDA) Commissioner Margaret A. Hamburg testifies on Capitol Hill in Washington, Wednesday, Nov. 14, 2012, before the House Energy subcommittee on Oversight and Investigations hearing on the Fungal Meningitis Outbreak. (AP Photo/Susan Walsh)
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