additional weapons to ukraine to help fortify the country from a potential russian invasion. this as moscow is ramping up its presence at the border. we have cnn anchor and correspondent jim sciutto with us on this story. this would be, to be clear, american assets on the ground. no question. as russia built up this force here, i m told the u.s. has a two-prong strategy. internationalize the crisis, get allies on board, warn russia with one voice, and the other thing, not give russia an expectation this would be a swift and easy invasion. two elements here. one, send more weapons to the ukrainians. also, the possibility of u.s. trainers and advisers. reporter: with concerns growing ability a russian military build-up on the ukrainian border, the biden administration is considering sending military trainers to the region. and military element that could include javelin anti-tank missiles and momortars, as wells