Twitter Has 140 Characters in Need of Leader

Some of Twitter's harshest critics are calling for the ouster of CEO Dick Costolo, even though his removal wouldn't alter the huge problems confronting the social-media company 
A stand-up guy.

For months now Twitter's Chief Executive Officer Dick Costolo has been the question that's too big to avoid. It was hard not to think about his shelf life as executives, rank-and-file employees and Wall Street abandoned the messaging service.

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