Ukraine's President invoked the horror of the 2001 terror attacks on the US as he pleaded for more military aid in a historic address to the US Congress. Volodymyr Zelensky said via video link that Ukraine was enduring a 9/11 every day as it battled Russian forces. He again urged the US and NATO allies to enforce a no-fly zone over Ukraine.<br />''  <br />'' President Biden is later set to sign off an extra 800 million dollars  military aid to Ukraine. The money will go towards anti-armour and anti-aircraft weapons, such as Stingers and Javelins, US media report. The funding is covered by a spending bill on humanitarian, defensive and economic assistance to Ukraine that was approved by Congress last week. Signing the bill on Tuesday, Mr Biden said that Russian President Vladimir Putin's attack on Ukraine had united people across the world.<br />''  <br />''<br />''Mr. Zelensky has repeatedly called on NATO to impose a no-fly zone over his country's airspace, but Nato has refused. A no-fly zone over Ukraine would mean that NATO forces would have to engage directly with any Russian planes spotted in those skies and shoot at them if necessary.<br />