Former US Vice President Dick Cheney speaks at the American Enterprise Institute on US national security in Washington, DC, May 21, 2009. Cheney said Thursday that bringing the 'worst terrorists' from Guantanamo Bay onto US soil would be 'cause for great danger' as he stood by tough interrogation tactics.'I think the president will find upon reflection that to bring the worst of the worst terrorists inside the United States would be cause for great danger and regret in the years to come,' Cheney said in a speech on national security.