After seven years:
1. First tweet
On March 21, 2006, Twitter founder Jack Dorsey fired up the world’s first, and rather unassuming, tweet on the nascent site.
“just setting up my twtter,” Dorsey wrote.
2. Uprising in Iran
3. Haiti earthquake response
4. Osama bin Laden raid leaked
5. Japanese earthquake and tsunami
6. Presidential Obama’s victory embrace
7. Pope Francis takes over @pontifex