What is the purpose of Bert the Turtle in the video?

To show what to do in case of a nuclear attack.

Explanation:

Every time an explosion went off, he demonstrated what to do by hiding in his shell which is what they wanted everyone to do.

yes based on alexanders actions he deserved the title of "the great". his empire covered about 3,000 miles and he was able to establish the empire over a 13 year period of time. he was able to conquer many different places. he also defeated the persians. he conquered egypt and developed a city and named it after himself.