OTTAWA, Feb 24 (Reuters) - Canada is sending four more Leopard 2 battle tanks to Ukraine and is imposing new Russia-related sanctions, Prime Minister Justin Trudeau said, marking the first anniversary of Russia's invasion of Ukraine on Friday. Canada will also provide an armored recovery vehicle and over 5,000 rounds of 155 mm ammunition to help Ukraine in its defense against Russia. See here for a complete list of exchanges and delays