The Cybersecurity and Infrastructure Security Agency (CISA) is a U.S. government agency responsible for protecting the nation's critical infrastructure from cyber threats and physical attacks. Established in 2018, CISA works to enhance the security and resilience of various sectors, including energy, transportation, and communications. The agency collaborates with federal, state, local, and private sector partners to share information and provide resources for improving cybersecurity practices. CISA also plays a key role in responding to incidents and managing risks associated with cyber threats. It offers tools, training, and guidance to help organizations strengthen their defenses. By promoting awareness and preparedness, CISA aims to safeguard the nation's infrastructure and ensure public safety.