ottawa canada pressure ally boost commitment peacekeeping propose offer helicopters use u.n. force mali could late provide troop work trainers two source familiar matter say wednesday prime minister justin trudeau liberal government come power 2015 quickly promise make 600 soldier available peace operations last year say would consider send soldier mali repeatedly put decision amid fear casualties stall irritate nations say could harm canada efforts win seat security council canada prepare send six helicopters use 10,000-strong u.n. force mali help deal militant threat say source request anonymity give sensitivity situation 80 members kill since 2013 make mali world deadly peacekeeping operation canada host international peacekeeping conference late month officials prepare special meet sideline discuss need mali mission term provide troop help train local force source say one option canada would send soldier act trainers role already play northern iraq say one source could either base mali nearby nations although ottawa send three separate fact-finding missions mali region canadian officials say yet take final decision whether send troop realize grow impatience final decision say canadian source familiar government think defense minister harjit sajjan tell reporters come peace support operations ... make sure take time make responsible decision decline give detail defense experts say give scale mali challenge doubt whether even 600 canadian troop could make difference front line senior diplomat nation involve peacekeeping say canadian government study mali mission carefully publicly discuss possibility send troop soldier start come home coffin debatable whether sajjan could give coherent explanation canada first place say diplomat canada propose helicopters u.n. mali mission source