What If a Mysterious Hacker Just Uploaded a Video Saying "Hello America, What a Good Day to Be Alive Right? What About a Little Nuclear Detonation to Make It Better?"

If this happened, there would be immediate international outrage and action to find this hacker and make sure that this never happens again. Governments would take the utmost caution and expand their cybersecurity infrastructure and protocols to make sure these kind of attacks never happen again. Law enforcement and counter-terrorism organisations would also be on high alert, especially in countries that are likely to be targeted by the hacker. The international community would be deeply concerned, and there would be calls for swift and severe justice.