montreal young montreal couple try use christmas light sandpaper make homemade bomb prosecutor tell canadian court wednesday open statements terrorism trial former college students items handwritten bomb-making recipe copy propaganda magazine publish al qaeda militants find royal canadian mount police search condo rent el mahdi jamali sabrine djermane 2015 prosecutor lyne decarie say quebec superior court montreal clear light would use make bomb jamali 20 djermane 21 plead guilty charge try leave canada join terrorist group possess explosive substance facilitate terrorist activity commit offense terrorist group 2015 arrest couple teenagers time come time international security force report wave young people include college students montreal head syria join islamic state militants decarie say investigators find materials jihadist propaganda evidence couple watch video canadian fighter islamic state new luggage clothe along passport applications discover search pair reiterate not-guilty pleas decarie begin remark listen high-security prisoners box enclose thick glass rcmp begin investigate couple receive tip decarie say arrest days late prosecutor say would call family friends accuse well police experts terrorism explosives witness trial expect last 10 weeks canadian teens try use christmas light bomb prosecutor