By David Ljunggren and Promit Mukherjee OTTAWA (Reuters) -Canada will remove many retaliatory import tariffs on U.S. goods and intensify talks with the United States on striking a new trade and security relationship,

Business owners in the nation's capital are reacting with guarded optimism after Prime Minister Mark Carney announced he plans to drop most of Canada's retaliatory tariffs on U.S. goods starting September.