North Korea fired more than 20 missiles! How much further will they go? - Read on

For days North Korean officials have raged over US-South Korean military drills, promising a violent response. That response came this week, when the North fired more than 20 missiles — one of which splashed down near the South Korean sea border. It was a significant escalation in a year that has already seen the most North Korean missile test launches ever, and it raises an important question: How much further will they go? North Korea's playbook has traditionally been to continually ratchet up provocations until it gets US attention — and can then negotiate for sanctions relief or other concessions from what it sees as a position of power.