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September 11 attacks
As Americans this week commemorate the 10th anniversary of the deadliest terrorist attack on U.S. soil, CNN national security analyst Peter L. Bergen examines the plot, the day, and its aftermath.
For further background, see:
September 11 attacks and aftermath in pictures
Afghanistan War
Iraq War
al-Qaeda

From the Encyclopædia Britannica

National Football League
The NFL kicks off its 92nd season this week as the defending Super Bowlchampion Green Bay Packersface the New Orleans Saints.
Some of the league's leading impact players:
Michael Vick
Tom Brady
Peyton Manning
Ray Lewis
Brian Urlacher
Drew Brees
Fashion Industry
The biggest names in fashion descend on New York this week as Fashion Week kicks off.

From the Encyclopædia Britannica

Baltic Sea
This relatively shallow sea in northern Europe was a major passageway of trade for the Hanseatic League in the Middle Ages and is today recognized as the largest expanse of brackish water in the world.
United Arab Emirates
A federation of seven states on the coast of the Arabian Peninsula, this country is home to diverse ethnic groups and presents a striking blend of ancient customs and modern technology.
Melbourne
This capital city of the Australian state of Victoria is the core of an extensive metropolitan area—the world’s most southerly with a population of more than 1,000,000.

From the Encyclopædia Britannica

Noble Gas
The seven chemical elements known as nobel gases—helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and element 118—are so named because of their reluctance to react with other atoms.
Richard J. Roberts
The American molecular biologist and author of Britannica's nucleic acidarticle received a share of the 1993 Nobel Prize for Physiology or Medicine for his independent discovery that genes contain segments called exons, which encode proteins, and segments called introns, which usually do not encode proteins.
Scientific Modeling
The generation of a physical, conceptual, or mathematical representation of a real phenomenon that is difficult to observe directly is a central component of modern science and helps scientists to explain and predict the behaviour of real objects or systems.

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