Answer:
John Hancock in August 2, 1776.
Answer:
Native Americans had never been exposed to those diseases.
Explanation:
The immigrants who came to the United States of America between the years 1820 and 1860 changed the character of the country because they brought with them their own culture and values. This started mixing with the already present culture and values and gave birth to a new character to the country. Among the immigrants were several Irish and German people.
Answer:
January 1967, when three astronauts were killed after their spacecraft caught fire during a launch simulation.
Explanation:
