Here is a look at some of the stories that CNN plans to follow this week:
Pressure builds on Libyan militias
The Libyan army on Sunday issued an ultimatum giving militias 48 hours to withdraw from military compounds and property belonging to members of the former regime in the country's capital and surrounding cities, the state-run LANA news agency said.
The development is yet another indication that public and governmental pressure is building against armed groups in Libya since people from a radical Islamist group were accused of involvement in an attack at the U.S. Consulate in Benghazi earlier this month that left four Americans dead, including U.S. Ambassador Chris Stevens.
On Friday, hundreds marched in Benghazi and took over the headquarters of Islamist militia Ansar al-Sharia, and protesters demanded an end to all security activities of armed groups operating outside the official command of the army or police.
Fighting groups that helped topple former Libyan leader Moammar Gadhafi have stepped in to maintain law and order after the fall of the regime, according to Frederic Wehrey, a senior associate in the Middle East Program at the Carnegie Endowment for International Peace. But militia members largely distrust the new government's authority, in part because of the "taint" of a link to the Gadhafi regime, Wehrey told CNN.
Obama to address Iranian nuclear issue, Mideast unrest at United Nations
U.S. President Barack Obama will likely address Iran's nuclear program the recent unrest in the Middle East and North Africa, including in Libya, when he speaks to the United Nations General Assembly on Tuesday, according to administration officials.
He is expected to once again reject the views in a controversial anti-Islam video that is thought to have instigated the violence, one official said, while underscoring that violence is never acceptable. Regarding Iran's nuclear program, the forum of world leaders is an "opportunity for him to underscore that Iran must not be allowed to develop a nuclear weapon, an official said. Western governments have suspected Iran of trying to make nuclear weapons, but Iran insists its nuclear program is solely for peaceful purposes.
Iranian President Mahmoud Ahmadinejad is one of many world leaders expected to speak at the General Assembly this week. Watch for walkouts – diplomats have walked out on his U.N. speeches for three straight years, due in part to controversial comments about Israel.
Speaking of Israel, watch for the Palestinian Authority to announce at the General Assembly on Thursday an attempt to obtain nonmember observer state status at the U.N., one step up from its current status as a permanent observer. Israel objects, saying it is an attempt to get state recognition by shortcut, circumventing negotiations on critical issues.
Helping get students into college
About 75-100 entrepreneurs and developers will gather on Thursday at Facebook's headquarters in Menlo Park, California, for a hackathon aiming to develop online tools to help young people get into college.
At the end of the daylong event, concepts will be presented to a panel of students. Their feedback and reactions will help decide the winners of prizes ranging from $1,000 to $5,000.
The event is sponsored by Facebook and the Gates Foundation. The foundation is hoping it will provide impetus for further entries in its College Knowledge Challenge, which will provide grants of $50,000 to $100,000, for ideas that help students in the college entry and graduation process.
Ice cream museum to open
In what should be one of the sweetest moments of the coming week, what bills itself as the world's first museum for gelato, or Italian ice cream opens, Thursday in Italy.
The 1,000-square-meter (10,763-square-foot) Carpigiani Gelato Museum in Bologna is "the first of its kind to delve into the history, culture, and technology of artisan gelato, a fresh, high-quality food that well represents Italian creativity and excellence throughout the world!" the museum's website says.
The museum will trace the history of gelato, from ancient Mesopotamia to current freezers, according to the museum's website.
"More than 20 original machines will find a new home in the Carpigiani Gelato Museum, along with multimedia presentations, 10,000 historical images and documents, precious accessories and tools of the trade from ages past, video interviews, and workshops," it says.
One question surely to be asked is, "Is this really the world's first?"
The answer probably depends on whether you consider gelato to be ice cream.
The website worldoficecream.com points out that ice creams have a certain amount of air whipped in. The less air, the better the quality. But gelato has no air at all.
So if you're not up for a trip to Italy and want something a bit closer to home, the Blue Bunny Ice Cream Parlor and Museum in Le Mars, Iowa, or the Velvet Ice Cream Museum in Licking County, Ohio, might be a better choice. And you can answer for yourself what's first or best.
Massive charity concert in New York City
Organizers are calling it the "largest syndicated charity concert in online and broadcast TV history." The stars are Neil Young with Crazy Horse, Foo Fighters, The Black Keys, Band of Horses and K'Naan. The venue is New York City's Central Park.
It's the Global Citizen Festival, organized by the Global Poverty Project to raise awareness and hopefully some money to fight extreme poverty around the world. The concert is being held while world leaders gather in New York for the U.N. General Assembly, and organizers hope the presence of 60,000 concert-goers in Central Park will help "to secure more than $100 million in new commitments from charities, businesses and governments to fight extreme poverty through our NGO partners," according to the festival's website.
Tickets were free and awarded to folks who registered as "Global Citizens" with the group and then took some action such as signing a petition or sharing an item about poverty on a social network for which they earned points. Three points gained entry into a drawing for tickets, of which 27,000 pairs were awarded. The drawings closed on September 17.
Other VIP tickets are available for purchase, at prices ranging from $189.50 to $3,750 on the event's website.
If you can't get a ticket, the concert will be streamed live online at 4:30 p.m. ET Saturday, with repeat showings streamed at 12:30 a.m and 8:30 a.m. ET on Sunday.
As to whether it will be the largest such event in history, MTV says portions of the Live Aid concert on July 13, 1985, were seen by 1.4 billion people. That's a pretty tall number to challenge.