Launch Point

This week’s subject: Cities

From caves to castles to condominiums, people have lived in a variety of communities. Today’s concerns about cities are the same as thousands of years ago, such as the need for a good water supply and a transportation system. Find out what planning goes into building a city and try creating one of your own through the direct links on The Times’ Launch Point Web site: Go to: https://www.latimes.com/launch/