NPR's Tell Me More is again using social media to reach out to a new community of leaders — this time, to recognize black innovators in technology. African-Americans represent just 5 percent of America's scientists and engineers, according to a 2010 study by the National Science Foundation.
The United States, along with five other world powers, has signed an agreement with Iran over its controversial nuclear program. What do Iranian expatriates in America think of the deal, which would temporarily ease western sanctions? Host Michel Martin speaks to human rights activist Sussan Tahmasebi and writer Roya Hakakian.