WIESBADEN, Germany — President Bush on Wednesday firmly defended his decision to invade Iraq, displaying his military pride on a tour of European nations that disputed the war. Speaking to about 3,000 U.S. troops and their families at Wiesbaden Air Base, Bush called the U.S.-led invasion that created tensions with many European allies “a decisive moment in the history of freedom.” “One of the key lessons of Sept. 11th is that we must confront threats before they fully materialize,” Bush said. “In Iraq we found a threat to the entire world.” He said that despite a violent insurgency that continues...