This week, Twitter turns 10. Over the next few days we’ll be exploring how far the microblogging service has come, the challenges it faces going forward and some of its key moments along the way. One of the most palpable sore spots in the dynamic between San Francisco and the tech industry that calls it home is the 225-acre patch in the heart of the city fittingly called the Tenderloin. It has been the site of some of the biggest and most successful tech companies – but is also the most concentrated display of the city’s chronic homeless program. On the…

This story continues at The Next Web