aubrey sarvis, mark thompson, we thank you both. >> thank you. >> ifill: again, the major developments of the day: federal reserve chairman ben bernanke warned that a government default could roil the financial system, and hurt job creation. coordinated bombings in mumbai, india killed at least 21 people and wounded more than 100. and media baron rupert murdoch dropped his bid to take over british sky broadcasting, amid allegations of phone hacking by his tabloids. at the "newshour" online, we've posted a story tonight about child marriage-- a practice that is far more common than you'd think. hari sreenivasan speaks with a photographer who has investigated the phenomenon across several continents. >> sreenivasan: more than 50 million girls under the age of 17 are already married in developing countries and 100 million more are expected to marry in the next decade. photojournalist stephanie sinclaire has traveled documented the practice of child marriage. over the past eight years she's gained intimate access to families and child brides who can be as young as five years old at the tim