USA Today. Retrieved March 16, 2016. ↑ "ICANN Targeted in Spear Phishing Attack | Enhanced Security Measures Implemented". icann.org. Retrieved December 18, 2014. ↑ http://www.justice.gov/file/eccleston-indictment/download ↑ "Former U.S. Nuclear Regulatory Commission Employee Pleads Guilty to Attempted Spear-Phishing Cyber-Attack on Department of Energy Computers". ↑ Nakashima, Ellen (28 September 2016).