Twitter celebrates seventh year and 200 million users

Service Twitter celebrated its seventh anniversary. In honor of the birthday, Twitter has created a video that shows the key moments in the history of social service: the first use of retweets,  hashtags , the first tweet from space and the opening video service  Vine .

The video talked about other important events that have occurred in the world during the existence microblogging: the tsunami in Japan, political protests in Egypt, the re-election of President Obama, who has received a record number of retweets.