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KNOW IT ALL: Tuesday's Top 6 Stories at NBC News

From a deadly storm to an interesting idea from Facebook and Apple, see the stories we're following.

Good morning, and happy Tuesday. Here are some of the stories we're following today:

1. Nurse who contracted Ebola identified

Nina Pham, the first person to contract Ebola in the U.S., became a certified nurse in 2010, but didn't earn her certificate in critical care nursing until Aug. 1 of this year, just weeks before she joined the team to care for a stricken Liberian man. The CDC is investigating how Pham may have contracted the Ebola while she is being treated at Texas Health Presbyterian in Dallas. Read more in NEWS.

2. U.N. medic dies of Ebola in Germany

An unidentified United Nations medical worker who was infected with Ebola in Liberia died at a hospital in Leipzig, Germany, officials said Tuesday. The 56-year-old man was diagnosed on Oct. 6 and arrived at the hospital on Oct. 9. More that 40 U.N. staff members who may have had contact with the man are under "close medical observation." Read more in NEWS.

3. Deadly storm system marches on through South

A deadly storm system that tore a path of destruction from Texas to Alabama continued southeast, threatening millions with heavy hail, rains, winds and possible tornadoes. Tornado watches are in place for eastern Alabama, the Florida Panhandle and western Georgia. At least 13 tornadoes were reported Monday from Texas to Alabama, leaving two people dead and thousands without power. Read more in WEATHER.

4. Kim Jong-un reemerges after absence

Several pictures published on the front page of North Korea's state-run Rodong Sinmun newspaper on Tuesday showed leader Kim Jong-un — his first public appearance since Sept. 3. The disappearance raised questions over Kim's health and status of power. In the pictures, Kim is often seen smiling and using a cane. See more in PICTURES.

5. Apple, Facebook to pay for female employees to freeze eggs

Facebook recently began covering egg freezing, and Apple will start in January. Why? Both companies are looking to attract more female employees. Advocates say the benefit allows women to have kids when they're ready, while others say the coverage is just a way to get women to basically live at the office, without the distraction of kids. Read more in NEWS.

6. Hong Kong police dismantle protesters’ site

Pro-democracy protesters faced a setback when police took sledgehammers and chainsaws to the barricades where the protesters have been set up for two weeks. As cars passed on Queensway Road on Tuesday for the first time, the protesters vowed they would rebuild their area and put their barricades back up. Read more in NEWS.

... What's trending today?

When most think of Italy, they think of wine, but who knew the country had a weed problem? Medical marijuana in Italy costs 10 times the amount of illegal weed. Doctor-prescribed doses could run more than a $1,000 per month. That's why most Italians who would be eligible for medical marijuana are turning to the illegal stuff instead. See how Italy plans to solve the problem: