Bush on Iraq and Afghanistan: "We Will Finish the Mission ... Period."

President Bush is vowing to succeed in building democracies in Iraq and Afghanistan -- declaring, "We will finish the mission we have begun -- period.

"Speaking to a conservative think tank, the president said most of the attacks on U.S. forces in Iraq have been in the so-called "Sunni Triangle," Saddam Hussein's home region.

Bush says that's where "the enemy will be defeated."

He likened the challenge in Iraq to that faced by the Allies in the 1948 Berlin Airlift. He chose his words to echo Harry Truman's famous answer to the Soviet blockade of West Berlin: "We are going to stay, period."

Bush says despite recent casualties, America and its allies in Iraq are on the offensive there -- and will remain that way. He says victory in Iraq will be "a great milestone in the history of liberty."

Bush's comments came after a report made by the commander of American forces in Iraq stated troops had detained up to 20 people suspected of links to the al-Qaida terror network.

Lieutenant General Ricardo Sanchez can't say for sure whether the detainees belong to the group.

Also, a deadly explosion occured today in the southern Iraqi city of Basra.

Iraqi police and hospital officials say six civilians died in the blast on a road often used by British forces in the region.