July 9 (UPI) -- X CEO Linda Yaccarino announced she's stepping down after "two incredible years" at the helm of the social media company. Yacccarino did not explain her decision to step down, but the announcement comes one day after the X chatbot Grok went on an anti-Semitic tirade. The bot referenced Adolf Hitler in reference to the flooding in Texas. "When [Elon Musk] and I first spoke of his vision for X, I knew it would be the opportunity of a lifetime to carry out the extraordinary mission