WBEZ brings you fact-based news and information. Sign up for our newsletters to stay up to date on the stories that matter.Earlier today, Defense Secretary Charles Hagel told reporters that the United States now believes the regime of Bashar al-Assad in Syria has used chemical weapons against rebel forces fighting to topple his regime. This would cross the “red line” previously set by President Barack Obama. Zaher Sahloul of the Syrian American Medical Society speaks to Worldview from Istanbul. (Photos: AP Images).