By Steve Holland, Parisa Hafezi, Phil Stewart and Yomna Ehab WASHINGTON/DUBAI, July 12 (Reuters) - U.S. and Iranian forces exchanged heavy missile and drone strikes with Tehran targeting U.S. facilities in states across the Gulf on Sunday after saying it had again closed the vital Strait of Hormuz. A series of attacks between the U.S. and Iran over the past several days led President Donald Trump to declare the end of a ceasefire meant to halt the fighting that the U.S. and Israel began on February 28, though Trump has left the door open to continued negotiations.
