"If we're not prepared to look at ourselves honestly, how can we be trusted to look at anything else honestly?" the editor, Carrie Gracie, said at a hearing of a parliamentary committee. The BBC has faced a series of challenges over its pay structure, including a grievance filed late last year by scores of journalists and the abrupt resignation of Gracie, the broadcaster's former China editor, last month over pay disparities. Facebook Chief Tries to Soothe Wall Street Over Changes to Site's News Feed Mark Zuckerberg, Facebook's chief executive, has embarked on an overhaul of what people see and consume on the social network. The changes have left investors wondering whether people will still spend as much time on the site and whether brands will continue placing as many digital ads there. On Wednesday, Facebook sought to soothe Wall Street's worries over those questions. No, people will not spend as much time on the site, the company said as it reported quarterly financial results.