From NPR News in Washington I'm Jack Spear.Israel and Hamas have agreed to a 3-day ceasefire starting tomorrow morning local time.Daniel Estrin reports from Jerusalem.The agreement is based on an Egyptian proposalthat would bring both sides to Cairo to work on a permanent ceasefire agreement.The Israeli Prime Minister's office says if this ceasefire holds,Israel has no reason to have its troops on the ground in Gaza.Israel says it will be watching closely to see if Hamas actually holds fire.On Friday, both sides had agreed to a similar ceasefire.But shortly after it was supposed to go into effect, fighting resumed with each side accusing the other of opening fire first.The US and Israel blamed Hamas.For NPR news I'm Daniel Estrin in Jerusalem.The American missionary who's contracted ebola received an experimental treatment of antibodies provided by a company in Santiago.That's according to federal health officials.NPR's Richard Harris has that story.Doctors had been infusing antibodies to people since the days before antibiotics.The concept is that these antibodies can target and kill certain germs.Several labs have been working on custom antibodies to attack ebola.That includes a company in Santiago called Mapp Biopharmaceuticals.CNN first reported that the company provided a sample of its experimental products to two American missionaries in West Africa who had contracted the disease.Federal health officials have confirmed that report.The company says it hasn't yet carried out safety test of the drug in people