A nurse has been quarantined at University Hospital in Newark for the possibility of Ebola has tested negative in a preliminary test, authorities said early this morning. Patti Sapone/NJ Advance Media /Landov hide caption

itoggle caption Patti Sapone/NJ Advance Media /Landov

Thomas Nellon (left), 17, and his brother Johnson Nellon, 14, of Liberia smile at their mother in the arrivals area at John F. Kennedy International Airport in New York earlier this month. The brothers received a health screening upon arrival. The U.S. says it will step up screening measures for arrivals from Ebola-affected West African countries. Craig Ruttle/AP hide caption

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Ras Baraka (right) is greeted by supporters after casting his vote Tuesday in Newark, N.J. Baraka defeated Shavar Jeffries, a former state assistant attorney general, for the mayoral office Cory Booker occupied from 2006 until October 2013. AP hide caption

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Sheikh Reda Shata stands in the men's prayer room at his mosque, The Islamic Center of Monmouth County, in Middletown, N.J., in Oct. 2011. From 2002 onward, Muslims in New Jersey allege police routinely monitored their comings and goings as part of a surveillance program. Mel Evans/AP hide caption

itoggle caption Mel Evans/AP