Washington (AFP) – The United States Capitol building was briefly evacuated Wednesday after a false alarm saw police tracking an aircraft that they said was a “probable threat” but turned out to be no danger. The initial statement said police tasked with protecting the complex at the heart of US government in Washington had ordered it be evacuated as they were “tracking an aircraft that poses a probable threat.” It did not give further details. The news became a top headline within minutes in the United States, where the memories of September 11, 2001 attacks — which saw Al-Qaeda fly passeng…