How did world war 1 change american attitudes and opinions about the future?

The rise of advertising in the 1920s. i am good with seeing how advertisements shape the roaring twenties and how it developed a new way of life through modern days. but i am not sure what the details of advertising in the 1920s were. if possible can you send me links (preferrably credential links) to sources that maybe show like the first company to start advertising through the radio, how advertising benefits (statistics graphs), etc.

What was the “u-2 incident” and how did it affect u. s./soviet relations in 1960?

Which best describes the main difference between the national woman suffrage association (nwsa) and the american woman suffrage association (awsa