By Elizabeth Dilts Marshall and Noor Zainab Hussain (Reuters) – Citigroup Inc Chief Executive Jane Fraser said on Friday that Europe was more likely than the United States to slip into a recession, as she joined other global bank CEOs this week to warn about the health of the global economy. Fraser, head of the third-largest and most globally focused U.S. bank, recently returned from a world tour with stops in Asia, Europe and the Middle East, where she said her conversations focused on “the three Rs.” “It’s rates, it’s Russia and it’s recession,” Fraser said, speaking at an investor conferenc…