"We can't give him the code, even though he has your wife. The deal is not worth it. The code could kill millions. We can not let that happen. We can not afford millions to die."
"The code could kill millions." Shouldn't "could" be "would" since it is saying that if the code is used, it would kill millions? Is "The code could kill millions" saying that if it is used, it is possible to kill millions (not guaranteed), or will kill millions if used?