The CALIPSO mission, in conjunction with CloudSat, provides the first multiyear global view of the vertical structure of aerosols and clouds, crucial for understanding their role in the climate system. Aerosols and clouds influence Earth's energy budget by reflecting sunlight and trapping thermal radiation. Anthropogenic aerosols significantly affect the global radiation budget, but quantifying their effects remains challenging. Clouds also play a critical role in the energy budget, and their interactions with aerosols are complex. The CALIPSO mission uses a lidar (CALIOP) and two passive sensors to measure aerosol and cloud properties, offering new insights into their vertical distribution and interactions. CALIOP is the first polarization lidar in orbit and provides long-term continuous measurements. The mission is part of the A-train constellation of satellites, offering a variety of measurement synergies and providing the first multiyear dataset of global aerosol and cloud profiles. The mission has improved the understanding of aerosol and cloud roles in the climate system, including their effects on cloud radiative forcing, cloud-climate feedbacks, and the vertical distribution of aerosols and clouds. CALIPSO data have been used to validate passive cloud retrievals and improve climate models. The mission has also provided new tools for studying thin cirrus clouds and their effects on the tropopause layer. The data from CALIPSO are still relatively new and are being used extensively by the scientific community to improve understanding of aerosol and cloud properties and their role in the climate system. The mission has opened new fields of investigation into the role of aerosols and clouds in the climate system and has provided new insights into their characteristics. The CALIPSO mission represents a successful cooperative effort between NASA and CNES and has provided the first multiyear global dataset of lidar aerosol and cloud profiles.The CALIPSO mission, in conjunction with CloudSat, provides the first multiyear global view of the vertical structure of aerosols and clouds, crucial for understanding their role in the climate system. Aerosols and clouds influence Earth's energy budget by reflecting sunlight and trapping thermal radiation. Anthropogenic aerosols significantly affect the global radiation budget, but quantifying their effects remains challenging. Clouds also play a critical role in the energy budget, and their interactions with aerosols are complex. The CALIPSO mission uses a lidar (CALIOP) and two passive sensors to measure aerosol and cloud properties, offering new insights into their vertical distribution and interactions. CALIOP is the first polarization lidar in orbit and provides long-term continuous measurements. The mission is part of the A-train constellation of satellites, offering a variety of measurement synergies and providing the first multiyear dataset of global aerosol and cloud profiles. The mission has improved the understanding of aerosol and cloud roles in the climate system, including their effects on cloud radiative forcing, cloud-climate feedbacks, and the vertical distribution of aerosols and clouds. CALIPSO data have been used to validate passive cloud retrievals and improve climate models. The mission has also provided new tools for studying thin cirrus clouds and their effects on the tropopause layer. The data from CALIPSO are still relatively new and are being used extensively by the scientific community to improve understanding of aerosol and cloud properties and their role in the climate system. The mission has opened new fields of investigation into the role of aerosols and clouds in the climate system and has provided new insights into their characteristics. The CALIPSO mission represents a successful cooperative effort between NASA and CNES and has provided the first multiyear global dataset of lidar aerosol and cloud profiles.