would these agencies have the biggest impact on global transportation security post 9/11.

• TSA
• Federal Emergency Management Agency (FEMA)
• United States Citizenship and Immigration Services (USCIS)
• U.S. Customs and Border Protection (CBP)
• U.S. Department of Justice (DOJ)

http://www.tsa.gov/

To assess which agencies would have the biggest impact on global transportation security post 9/11, we need to consider the roles and responsibilities of each agency and how they are directly related to transportation security.

1. Transportation Security Administration (TSA):
The TSA was created in response to the 9/11 terrorist attacks and is primarily responsible for ensuring the security of the nation's transportation systems, including airports, seaports, and mass transit systems. TSA agents are responsible for passenger and baggage screening, as well as implementing security regulations and protocols to prevent potential threats.

2. Federal Emergency Management Agency (FEMA):
FEMA is an agency of the U.S. Department of Homeland Security (DHS) that primarily focuses on responding to and recovering from disasters, including natural disasters and acts of terrorism. While FEMA's primary focus is not transportation security, it plays a critical role in coordinating emergency response efforts after an incident, which can include transportation-related elements.

3. United States Citizenship and Immigration Services (USCIS):
Although USCIS primarily focuses on immigration services, including processing immigrant visas and granting citizenship, it does have a role in transportation security. USCIS is responsible for conducting security checks and background investigations on individuals applying for immigration benefits, including visas. This helps prevent individuals with potential security risks from entering the country and potentially posing a threat to transportation security.

4. U.S. Customs and Border Protection (CBP):
CBP is another agency under the DHS that is responsible for securing U.S. borders and facilitating legitimate trade and travel. CBP plays a critical role in protecting transportation infrastructure by enforcing immigration laws, conducting inspections at ports of entry, and preventing the illegal entry of individuals and goods that may pose security risks.

5. U.S. Department of Justice (DOJ):
While the DOJ does not directly handle transportation security, it plays a vital role in investigating and prosecuting individuals involved in acts of terrorism or other security threats that may affect transportation systems. The DOJ works closely with other agencies, such as the FBI, to identify and apprehend individuals involved in criminal activities related to transportation security.

Considering their specific missions and functions, the TSA and CBP would likely have the most significant impact on global transportation security post 9/11. The TSA focuses on securing airports and the passengers who use them, while CBP has a broader responsibility for securing U.S. borders and ensuring the safe and efficient movement of people and goods. These agencies work together to implement security measures and intelligence-driven strategies to prevent potential threats to transportation systems.