In which city did engineer gustav eiffel construct his iron and steel tower, the world's tallest structure when it was built in 1889?
a. paris
b. new york city
c. berlin
d. london

Carefully examine this photograph of a home bomb shelter. fearing a nuclear attack, many people put these in their homes during the 1950s. describe what you see in the image. what kinds of things did this homeowner think to include?