"Feel terrible this happened. Tough day for us": Jack Dorsey on Twitter hack
Moments after Twitter accounts of several notable personalities like Barack Obama and Bill Gates were taken over in a massive breach, the CEO of the micro-blogging site, Jack Dorsey took to Twitter to express disappointment. "Tough day for us at Twitter. We all feel terrible this happened. We're diagnosing and will share everything we can when we have a more complete understanding of exactly what happened," he tweeted.