Twitter went down about 9 a.m. Pacific time Thursday, due to a “cascading bug” The micro-blogging site says the service fully recovered at 11:08 p.m., Pacific time. A hactivist group that calls itself UGNazi, also known as Underground Nazi Hacktivist Group, claimed its DDoS attack took down Twitter. The group claimed it took down the site because of its support for the Cyber Intelligence Sharing and Protection Act (CISPA)”]
Source: https://www.csoonline.com/article/2131895/hactivists-did-not-cause-twitter-outage.html