Dr Weiss's article on Aquinas was cited in relation to recent debates over gun control: https://www.nytimes.com/2017/11/11/opinion/sunday/christians-support-gun-control.html
The quote comes from an article arguing that Aquinas's position regarding the killing of innocent people differs significantly from other representatives of the Christian just war tradition.
The full text can be found here: http://onlinelibrary.wiley.com/doi/10.1111/jore.12187/abstract