Sen. Rob Portman, reportedly on the short list for the Republican vice presidential nomination, met in Israel with its top leaders.
A Palestinian gunman broke into Israel on Friday and killed a soldier before being shot dead himself in a rare cross-border attack that Israel blamed on the Islamist group Hamas.
Following is a timeline of events in Syria since protests began.
The escalating violence in Syria shows the urgent need for the international community to take bolder steps, U.N. Secretary-General Ban Ki-moon told a news conference in Istanbul on Friday.
Syrian forces and pro-government militia accused of committing a massacre in Houla could face prosecution for crimes against humanity, the United Nations said on Friday and rights experts said Syrian authorities had directly ordered torture.
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