TEHRAN - Iran took another step to expand its nuclear activity on Wednesday, resuming uranium enrichment at an underground facility amid a standoff over a 2015 international deal to curb the Middle Eastern country's nuclear program.The move is likely to spark an outcry as the United States and European countries have urged Iran not to advance its nuclear development efforts.Iran's atomic agency said the country has begun injecting uranium gas into centrifuges at its facility in Fordow in central Iran.The United States withdrew from the nuclear deal last year and has imposed sanctions on Teh…READ FULL ARTICLE