This is the term used in the 1920s to describe a film that incorporated synchronized dialogue rather than being a "silent" film.

Talkie

Explanation:

Movies before the mid-to late 1920s were usually silent. This, however, began to change in the late 1920s. Movies began to incorporate synchronized sound, as opposed to being silent, around 1927. These movies were known as "talkies." Although they became extremely popular in the United States, other countries were more reluctant to adopt them.

our current president donald trump

the quote by walter cronkite contributes to the central idea of the text by supporting the central idea. cronkite argues that what is deemed “right” for and in america may not be good for other countries. this supports the central idea of the text, that the vietnam war was unpopular in america for multiple reasons- including cronkite’s.