Complex sentence: U.S. Commission on National Security/21st Century (USCNS/21) also known as the Hart-Rudman Commission or Hart-Rudman Task Force on Homeland Security, was chartered to review in a comprehensive way U.S. national security requirements for the next century.
Split into simpler sentences: U.S. Commission on National Security/21st Century/Hart-Rudman Commission is also known as the Hart-Rudman Task Force on Homeland Security. It was chartered to review in a comprehensive way U.S. national security requirements for the next century.