On March 6, 2012, the House Homeland Security's Subcommittee on Border and Maritime Security held a hearing, "From the 9/11 Hijackers to Amine el-Khalifi: Terrorists and the Visa Overstay Problem."

Witness Testimonies:

• John Cohen
  Deputy Counter-Terrorism Coordinator
  U.S. Department of Homeland Security
• Peter T. Edge
  Deputy Associate Director
  Homeland Security Investigations, ICE
• David Donahue
  Deputy Assistant Secretary of State for Consular Affairs
  U.S. Department of State