Hackers invaded twitter accounts of more than 30 well-known public figures and accounts, among them the new USA President of America, Barak Ompama, Britney Spears, Fox News account etc. The attackers have used those accounts to send messages, many of them with aggressive content. According to Twitter, the accounts were hacked via tools that are used for internal support of the company. These are tools used by Twitter employees to modify emails of an account, etc. “We admit that this is a very large security gap and thus we immediately disabled these tools.” Moreover the breached accounts we temporarily disabled.