What security measure has been implemented for checked baggage since the Aviation Security and Transportation Act of 2001?

The implementation of 100% screening for checked baggage is a significant security measure enacted in the wake of the Aviation Security and Transportation Act of 2001. This law was a direct response to the events of September 11, 2001, aiming to enhance aviation security and protect passengers and crew during flight.

Under this mandate, all checked baggage must be screened before it is loaded onto an aircraft. The goal of this comprehensive screening process is to detect and prevent potential threats, such as explosives or other dangerous items, from being transported in the cargo hold of a plane. This rigorous approach increases safety significantly, as it ensures that every piece of checked luggage is examined with advanced technology and procedures implemented at airports.

The other options do not align with the requirements of this act. Random inspections, voluntary checks, and additional weight limits do not provide the level of security and assurance that 100% screening does. The focus of the mandate is solely and unequivocally on ensuring that every single piece of checked baggage is thoroughly screened for safety.