Hawaii employee who sent false missile alert: 'I was 100 percent sure it was real'

False alert sent in Hawaii highlights preparations for missile launch

False alarm: Erroneous alert issued about nuclear missile threat in Hawaii

Who is the worker behind false missile alert in Hawaii?

Missile false alarm prompts Hawaii to change protocols

Hawaiian congresswoman calls false missile alarm 'an epic failure of leadership'

Accidental ballistic missile alert warning issued to cell phones in Hawaii

Hawaii 'ballistic missile threat' alert to phones was false alarm, officials say

Hawaii missile alert mistake