The government created the Department of Homeland Security in 2002.
Americans were worried about terrorism in general during this time due to the attacks on the twin towers on September 11, 2001. This attack on American soil shook America's foundation and caused an increased amount of fear. The citizens looked to the government to increase security/investigations to ensure that this did not happen again. Hence the creation of the Department of Homeland Security.
This government agency is focused on several different categories. This includes: cyber security/cyber terrorism, border safety, anti-terrorism (aka terrorism prevention), and disaster prevention. This agency still exists today and plays a huge role in preventing attacks on American soil.
Answer:
Muslim merchants migrated east to the land of Tang, Changan and other Chinese cities, Some merchants returned to their lands but others remained in those lands with the Tang emperor's permission and also allowed them to marry Chinese women. In Islam, Muslim children were also Muslims and the religion in the East rose.
