The Christmas Day terror plot is the focus of national security hearings underway on Capitol Hill.
Congress wants to know how Umar Abdul-Mutallab, a man with known links to terror groups, was allowed to board a plane headed for the U.S. with explosives.
Lawmakers criticized the intelligence community for using outdated equipment to track terrorists.
"Our intellegence community continues to rely on internal systems and processes that are relics from the days before reforms," Maine Sen. Susan Collinssaid.
"This administration and the men and women of DHS (Department of Homeland Security) are working 110 percent everyday to minimize the likely hood of a successful terrorist attack against the homeland," Homeland Security Secretary Janet Napolitano said.
The national security team admitted the attempted bomber should have been questioned by interrogators who are trained to deal with high-value detainees.