A year after the attacks on the World Trade Center and the Pentagon, PBS FRONTLINE explores what America saw on September 11th. For many people, the most difficult questions that remain are not about politics, military strategy, or...

E-book page on the final era of the Vietnam War in which the Pentagon Papers were released, protest and conflict over the war increased at home and Nixon's Vietnamization began. Questions for discussion, glossary and link to primary...

Given a shape, students select from four options the name of the shape. These include more than the basic shapes, such as hexagon, pentagon, parallelogram, and rhombus.

Victims of the tragic events of September 11th, Pentagon, World Trade Center, and United Flight 93 Pennsylvania, are listed and remembered in this special project.

Find out about the Native Americans who used their tribal languages as code during World War I and World War II. Includes information on Charles Chibitty, a Comanche code talker who was inducted into the Pentagon's Hall of Heroes.

Pentagon Memorial

U.S. Secretary of Defense Ash Carter says the military is lifting a ban on transgender service members.

This photo overlooks the Pentagon in Arlington County, Virginia, USA. The Pentagon is the headquarters of the US Department of Defense. Around 25000 people work there and it is the world's largest office building by floor area.

Pentagon (Washington)

Vivid slideshow of the Pentagon attack on September 11, 2001.

Pentagon Memorial

Pentagon Memorial

A view of the US Pentagon from above.

This activity is designed as an introduction to using the Carbri Jr. application on the TI-83+/84+ calculators. Students are guided through the menu system and are shown how to draw triangles, quadrilaterals and and a pentagon. Perimeter...

This U.S. Supreme Court case allowed the publication of the "Pentagon Papers." The OYEZ resource provides an abstract containing a concise summary, an audio file, a link to the full text of the decision and a record of how the justices...

This is the text, audio, and video of Ashton B. Carter, the newly appointed 25th Secretary of Defense, addressing his colleagues concerning how he will approach the position on February 19, 2015, at The Pentagon, in Washington, D.C.

View photos and read personal stories about the September 11, 2001 attacks on the World Trade Center and the Pentagon.

An overview of the terrorist attacks on the World Trade Center and the Pentagon that resulted in the United States' declaration of a Global War on Terror.

An interview with James Goodale, the general counsel for "The New York Times" during the Pentagon Papers case, concerning the Pentagon Papers and the First Amendment.

Develop problem solving skills working with pentagons and then check your results.

[Free Registration/Login Required] Fun game involving designing a football path around the high school using pentagons and hexagons.

This review lesson about basic shapes (polygons)contains varied hands-on exercises and tilings about triangles, quadrilaterals, pentagons, and hexagons.

Building is symbolic of national military power.

The properties of the four different types of polygons--pentagons, hexagons, heptagons, and octagons--are discussed here. Some practice questions are also given to test your knowledge.