Wall Street's main indexes fell on Wednesday as unease surrounding U.S.-Iran tensions cast a shadow on Middle East peace talks, setting a cautious tone for the second half of the year.
Tehran said it would not meet with top U.S. envoys who flew to the region following an outbreak of hostilities. Although a source with direct knowledge of the talks as well as an Iranian official said the U.S. and Iran held technical talks in Doha, contrasting rhetoric suggested a breakthrough may prove to be elusive.
