What additional documentation is required from a non-US citizen initiating flight training in the U.S.?

When a non-U.S. citizen is initiating flight training in the United States, they are required to provide two sets of fingerprints and personal information as part of the process. This requirement is a security measure designed to conduct background checks through the Transportation Security Administration (TSA). The TSA needs to verify the identity of non-citizens engaged in flight training to ensure national security.

This process includes not only fingerprinting but also ensuring that the individual does not pose a security threat and is legally allowed to participate in flight training. It is a crucial step for maintaining safety and regulatory compliance in aviation training environments.

The other options, while potentially relevant in certain contexts, do not fulfill the specific requirement set forth by the TSA for non-U.S. citizens starting flight training. For instance, flight logs and letters of recommendation are useful in establishing a pilot's history and qualifications, but they are not mandatory for security clearance. Proof of citizenship from their country might be necessary for administrative processes but does not address the specific security requirements involved in commencing flight training activities.