Over its 10-year history, Twitter has marked numerous world events and created its own unique moments. Here are a few key milestones in Twitter history: just setting up my twttr — Jack (@jack) March 21, 2006 March 2006: Twitter co-founder Jack Dorsey (@jack) sent the first tweet, an automated message saying "just setting up my twttr." That same day, he sent the first live tweet, "inviting coworkers." Arrested — James Buck (@jamesbuck) April 10, 2008 April 2008: US university student James Buck (@jamesbuck) got off a one-word tweet "Arrested" after being taken into custody by Egyptian authorities at an anti-government protest in that country. In what is seen as an early demonstration of the power of Twitter to rally people to a cause, the resulting outcry prompted authorities to quickly restore his liberty. He proclaimed his release in a tweet reading "Free." http://twitpic.com/135xa - There's a plane in the Hudson. I'm ...