America responded immediately by declaring a global war on terrorism but
after 15 years since 9/11 terrorism in various forms have proliferated
and terrorist attacks have periodically taken place even in the United
States particularly by Muslim migrants which made Donald Trump declare
that he would ban all Muslims from entering the United States. He has
also declared building a wall on the Mexican-US border to prevent
Mexicans – whom he accuses of drug smuggling and other crimes –
illegally entering the country.