An actual answer (linking to archive.org since usaid.gov has been taken down): https://web.archive.org/web/20250117221701/https://www.usaid...
> The information about USAID’s development and humanitarian assistance programs is intentionally open and public; to perform the agency’s mission, USAID employees work directly with non-government organizations, contractors, United Nations organizations and host country governments. However, in order for USAID employees to effectively and efficiently carry out the agency’s programs, they often must have access to sensitive and sometimes classified information provided by other federal departments and agencies. Such information may pertain to U.S. foreign policy and relations as well as security conditions and threat data.