U.S. Secretary of State John Kerry has told VOA that implementing the international nuclear deal with Iran will make the world safer, improve the standard of living for Iranians and potentially open up other opportunities between the United States and Iran. Secretary Kerry has been playing a lead role in the Obama administration's efforts in obtaining support among skeptical U.S. lawmakers. VOA's Richard Green has more from Washington. VOA Khmer's Ly Moryvan narrates.