Twitter crosses enemy lines in search of new friends

Twitter has joined Instagram — only six years late to the game.  Unfortunately for Twitter, being slow moving isn't new to the platform that has struggled with product innovation and user growth. But it's a new year for Twitter, and the company is on a kick to grow, especially in live video and on its core app. SEE ALSO: 'Everyone wants us to win' — Twitter's marketing chief on the company's future The move to leverage Instagram's 600 million monthly active users to grow its bas