Elizabeth O’Bagy, a pro-Syrian opposition analyst whose credibility has come under fire, might have even more explaining to do – as court documents show she once vouched for a rebel group whose website displayed extremist and anti-American images. Among the pictures was one showing a burning U.S. Capitol. O’Bagy was fired earlier this week by the Institute for the Study of War for allegedly lying about her academic credentials. Her writings had been used by U.S. officials to bolster their case for military action against the Assad regime. O’Bagy discussed the rebel group in question in a June 19, 2013...