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.
President Obama and Republican nominee Mitt Romney hold their first debate October 3 from the campus of the University of Denver. Watch CNN.com Live for all the latest coverage from the election.
Today's programming highlights...
9:30 pm ET - Romney high school rally – GOP presidential candidate Mitt Romney spends part of his day in Denver, Colorado, where he will address supporters at a "victory rally" at a local high school.
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