ottawa unite state see urgent need new energy pipeline canada unite state u.s. secretary state john kerry say wednesday broadcast interview ahead visit washington prime minister justin trudeau u.s. government evaluate new proposals individually look new clean technologies kerry say canadian broadcast corp. 300 pipelines pipeline-less kerry say accord story broadcaster website things change technologies particular help change things need push technology curve trudeau attend state dinner thursday become first canadian leader since 1997 two countries aim fix fray relationship u.s. president barack obama last year block cross-border keystone xl crude oil pipeline propose transcanada corp victory environmentalists kerry say press need u.s.-canada pipeline cbc