Email suggestions (specific submission title edits, general edit-rewriting rules) to the mods: hn@ycombinator.com.

HN guidelines typically prefer sourcing a title from the text of the document itself. Given Politico seem to be rotating through clickbait variants (the presently displayed title is "Trump Is Tired of Arming Allies. This Country Is Stepping Up.", the submitted title appears elsewhere in the page source), I'd suggest:

"The rise of South Korea’s weapons business"

Which is non-clickbaity, succinct, clear, and accurate. It appears at the start of the 4th body 'graph.

I'd argue it's superior to the subtitle "The U.S. retreat from the global stage is an opportunity for South Korea.", as that option fails to indicate the nature of that opportunity. South Korea and arms trade are the key elements discussed.

Ok, we've put that in the title above. Thanks!