The expression "fireworks" gets its meaning from the fireworks that people shoot into the sky when they are celebrating a great event.

VOA: special.2009.07.05

North Korea's official Rodung Sinmun newspaper described the country as a "proud nuclear power" Monday, and warned it would be a "great mistake for the United States to think it will not be hurt" in the event of military conflict on the peninsula.

VOA: standard.2009.06.22