In this four-minute episode of PBS's "History Detectives," Charlotte Brooks, speaks about the relationship between Chinese immigrants and the white populations with which they came into contact in the U.S. Topics covered include the transition from violence to non-violent discrimination, the simultaneous romanticization and distrust of the Chinese, the lack of Chinese legal standing, and the way in which the arrival of Japanese and Filipino immigrants altered the social standing of the Chinese.

Teachers should be aware that the term tong is never defined within the talk. It essentially refers to Chinese organized crime groups within early Chinatowns. The violence and disparity of the anecdotes called to attention in this discussion render it better suited to middle or high school students, rather than an elementary audience.

Brooks holds a BA in Chinese history, as well as a MA and PhD in American history. She currently teaches at Baruch College, and primary academic interests include Asian American history, politics, and community in California.

The Presidio of San Francisco has served as a barracks for 218 years, and has been occupied by three countries. Now, visitors can enjoy the stunning architecture of the Presidio, as well as see the historic airfields and national cemetery also located in the park. In addition to the impressive history and culture of the Presidio, the park also serves as a haven for endangered species and features beautiful and expansive views of the Golden Gate Bridge, the city of San Francisco, and Marin County.

The site offers historic information about the Presidio, visitor information, a photo-gallery containing 92 photographs of the Presidio and its surrounding grounds, and resources for educators, including an interactive field trip planner and educational online games for students.

The Old Post Office, built between 1892 and 1899, is home to the Bells of Congress, which were a present from England on the nation's Bicentennial. From the observation deck, located 270 feet above the street level, the visitor can get a spectacular view of the nation's capital.

The tower offers exhibits and tours.

The Washington Monument is the most prominent, as well as one of the older, attractions in Washington, D.C. It was built in honor of George Washington, who led the country to independence, and then became its first President. The Monument is shaped like an Egyptian obelisk, 555' 5/8" high, and averages 30 to 40 miles visibility in clear weather. It was finished on December 6, 1884.

The monument offers elevator rides to its top.