DUBAI, United Arab Emirates (AP) — U.S. President Donald Trump and top Iranian officials exchanged dueling threats Friday as widening protests swept across parts of the Islamic Republic, further escalating tensions between the countries after America bombed Iranian nuclear sites in June. At least eight people have been killed so far in violence surrounding the demonstrations, which were sparked in part by the collapse of Iran’s rial currency but have increasingly seen crowds chanting anti-government slogans. The protests, now in their sixth day, have become the biggest in Iran ...