Longtime CNN anchor Jim Clancy has left the cable news network following a controversial exchange on Twitter over the Charlie Hebdo attack in which he both mocked pro-Israel advocates and used a disability slur.

On Friday, a number of jihadist-linked Twitter accounts began tweeting links to khilafalive.info, a Web site which claims to be an "official website for the supporters of the Islamic State Caliphate." A selection of video and radio channels were hosted on the site, some playing Islamic State propaganda videos and others jihadi nasheeds (a type of Islamic vocal music). Users were able to "chat" with fellow viewers.

At times, digital diplomacy may be used to foster dialogue between two countries that have yet to establish diplomatic relations.  Last month, Twitter announced that another world leader had joined the world of digital diplomacy – Palestinian Authority President Mahmoud Abbas.

The Islamic State terrorist group has launched a big social media campaign to try to capitalize on the Paris massacre.  Twitter feeds and other social media messages began Sunday, urging each Muslim to act as a “city wolf” and kill co-workers and fellow commuters.

For diplomats and diplomatic institutions, social media has become an important working tool as it enables them to gather and disseminate information throughout the diplomatic milieu in real time.

The Twitter account for U.S. Central Command was apparently hacked on Monday, with pro-ISIS messages plastering the account's profile.  The first message was posted at 12:29 p.m. ET, with the words "AMERICAN SOLDIERS, WE ARE COMING, WATCH YOUR BACK. ISIS." and the hashtag "#CyberCaliphate."

Following the attack on satirical magazine Charlie Hebdo that left 12 people dead Wednesday in Paris, Twitter users around the world showed their solidarity using the hashtag #JeSuisCharlie, or “I am Charlie.” As of this writing, the hashtag has been used 3.7 million times.