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A Russian warplane shot down over the Turkish border on Tuesday crashed in an area of Syria that advocates want to protect with a no-fly zone, or even a "safe zone" — fenced off from attacks by the Syrian regime or extremist groups like the Islamic State.

Democratic presidential hopeful Hillary Clinton, Republican candidates Marco Rubio and Lindsey Graham, and other voices including Rep. Adam Schiff, D-Calif., all support a no-fly zone or safe zone in Syria.

"The reality is this outbreak's not over," says Dr. William Fischer, speaking about Ebola. "It's just changed."

Fischer, a professor at the University of North Carolina who's been studying Ebola survivors, was speaking about the new cases in Liberia. On Monday, a 15-year-old died of the disease. The teenager's father and brother have also tested positive for Ebola. Health authorities have not yet determined how the family was infected.

An explosion ripped through a bus carrying presidential security in central Tunis on Tuesday, prompting the Tunisian president to issue a state of emergency for the North African country.

NPR's Leila Fadel reports that a spokesman for Tunisia's Interior Ministry said at least 11 people were killed in the attack and 17 others were wounded. The state of emergency will last for 30 days and an overnight curfew is also in place until tomorrow morning local time.

The last time you ate cranberry – perhaps as a dried snack, in a glass of juice or as a saucy condiment with the Thanksgiving turkey – it was likely paired with sugar, and a lot of it. A cup of cranberry juice may be packed with antioxidants, but it has about 30 grams (or 7.5 teaspoons) of sugar.

They won't actually get to host Saturday Night Live, but four GOP candidates have completed agreements with NBC allowing them to broadcast campaign messages on affiliate stations in Iowa, New Hampshire and South Carolina over Thanksgiving weekend.

These deals resulted from "equal time" requests made after leading GOP candidate Donald Trump guest-hosted Saturday Night Live on Nov. 7.