RT News - July 01, 2015 (12:00 MSK)

Greece becomes the first developed country to fail to pay its debt to the IMF. A default now looms as rescue talks grind to a halt. Europe's police agency moves to tackle Islamic State's social media onslaught, which is attracting supporters in droves. World powers and Iran agree to extend their nuclear talks for a week, but the U.S. president warns he could still walk away from the deal.