SAN FRANCISCO — Twitter CEO Jack Dorsey's account has gotten hacked, and whoever broke in sent racist and vulgar tweets to his 4.2 million followers. Some of the tweets were up for about 30 minutes ...

NEW YORK - Twitter co-founder Jack Dorsey, who was the social platform's first CEO in 2007 until he was forced out the following year, then returned to the role in 2015, is once again out of the job — ...