Dr. Craig Spencer returned home this week from a New York City hospital after testing free of the Ebola virus. He had been diagnosed with the virus three weeks ago after treating Ebola patients in Guinea. Vice President Joe Biden praised faith groups for their efforts to fight the disease in West Africa. He said their ability to understand cultural differences makes them effective. In Liberia, the state of emergency was lifted due to the declining rate of infections, though the country remains on alert amid reports of new outbreaks in rural areas.