Donald Trump was permanently suspended from Twitter due to the risk of further incitement of violence.
Justin Bieber reached one million followers on Twitter.
Justin Bieber made his first tweet at 8:27 pm, promoting his single 'One Time.'
Chris Messina Tweeted #barcamp, which became the first use of a hashtag on Twitter.
Twitter was launched to the public.
The first-ever Tweet was published on Twitter.
