The US and Iran exchanged fire in a flareup of violence on Monday that also drew in the United Arab Emirates, prompting calls for renewed strikes on Iranian targets and casting doubt on the fate of a four-week ceasefire. Bloomberg's Joumanna Bercetche has the latest. -------- More on Bloomberg Television and Markets Like this video? Subscribe and turn on notifications so you don't miss any videos from Bloomberg Markets & Finance: https://tinyurl.com/ysu5b8a9 Visit http://www.bloomberg.com for