A surface-to-air missile shot down a passenger plane over Ukraine, killing all 298 people aboard. Ukraine and Russia traded blame, but it remained unclear who was responsible. Israel launched a ground offensive against Hamas in the Gaza Strip after a temporary cease-fire. Nuclear negotiations between Iran and world powers will hit a deadline on Sunday, but talks seemed likely to be extended. The U.S. announced new sanctions against Russia over Ukraine. Russia’s President Putin warned of consequences. And in Syria, President Assad was sworn in for a third term. A panel of journalists joins Diane for analysis of the week’s top international news stories.