Entering service in 1989, the 475-kiloton-produce W88 fusion warhead will be the mainstay with the US Trident II nuclear missile submarine fleet, which types just one third in the American nuclear defense triad. Ch?a h?t, dung l??ng trang ch? ?ã ???c t?i ?u hóa ?? phù h?p v?i m?i thi?t b?. ??m b?o ng??i ch?i nào c?ng ghi?n v?i nh?ng gì mà nh