World -

The deadline for agreeing on at least the outline of a nuclear deal is Tuesday. Hanging over the negotiations is a Middle East in disarray and an extraordinary dynamic in which the U.S. and Iran are working both alongside and against each other in several conflicts. Margaret Brennan reports on the latest from the site of the talks in Switzerland.
Yemen has become a major front in the battle between the main factions of Islam. Saudi Arabia has evacuated dozens of foreign and Saudi diplomats from the port city of Aden in Southern Yemen, and the UN has evacuated staff from Sanaa, the capital. President Obama spoke on the phone with the King of Sunni Saudi Arabia, which is conducting air attacks on Shiit
Italy's highest court acquitted Amanda Knox's second murder conviction. Knox and her then boyfriend were accused of killing a fellow student in 2007. CBS News legal analyst Rikki Klieman joins "CBS This Morning: Saturday" to tell us more about the long running case.
The search for human remains and evidence continues at the crash site on a mountainside in the French Alps. All 150 people aboard Germanwings Flight 9525 were killed in the crash. It is now clear that this was a deliberate act by the co-pilot, Andreas Lubitz, and there are some indications of possible motives. Allen Pizzey reports from Lubitz's hometown
New information about Andreas Lubitz's past connects him with town near where passenger plane crashed into French Alps
The Saudis want help in stopping the Iranian-backed Houthi rebels from advancing in Yemen
The U.S. accepted the offer to help drive ISIS out of the city but under one major condition
Saudi Arabia and its allies have dropped hundreds of bombs this week on Shiite rebels, but Jere Van Dyk wonders if they've bitten off more than they can chew
Former NTSB Chairman Mark Rosenker talks to Vladimir Duthiers and Gideon Yago about mental health screenings for pilots.
The crash of Germanwings Flight 9525 highlights concerns about how to ensure pilots are physically and mentally fit to fly