After a U.N. weapons inspections team led by Hans Blix, as well as another team led by Mohamed ElBaradei, failed to find evidence of an ongoing Iraqi WMD program, Bush's proposed regime change in Iraq faced mounting international opposition. Germany, China, France, and Russia all expressed skepticism about the need for regime change, and the latter three countries each possessed veto power on the United Nations Security Council. At the behest of British prime minister Tony Blair, who supported Bush but hoped for more international cooperation, Bush dispatched Powell to the U.N. to make the case to the Security Council that Iraq maintained an active WMD program. Though Powell's presentation preceded a shift in U.S. public opinion towards support of the war, it failed to convince the French, Russians, or Germans. Contrary to the findings of Blix and ElBaradei, Bush asserted in a March 17 public address that there was "no doubt" that the Iraqi regime possessed weapons of mass destruction. Two days later, Bush authorized Operation Iraqi Freedom, and the Iraq War began on March 20, 2003.