WASHINGTON (Reuters) -U.S. President Joe Biden, British Prime Minister Boris Johnson and Canadian Prime Minister Justin Trudeau pledged on Tuesday to send more artillery weaponry to Ukraine in the face of an all-out Russian assault on that country’s East. Biden spoke with Johnson, Trudeau and other allied leaders in a secure video call from the White House Situation Room as the Russian invasion reached a new phase. Asked by reporters during a visit to New Hampshire if the United States would be sending more artillery to Ukraine, Biden replied yes. In London, Johnson told lawmakers: “This will …