Edwin Vargas, 42, was arrested on Tuesday for allegedly buying email login credentials and cracking fellow officers' email accounts.
Following a series of high-profile Twitter account hijacks, the microblogging service finally has delivered two-factor authentication.
The 100-page report mostly addresses alleged Chinese cyber espionage operations, and suggests it's time for U.S. government agencies and corporations to consider more proactive approaches, possibly including hack-backs.
