Overview: CANDELS is a powerful imaging survey of the distant Universe which was carried out with near-infrared WFC3 and optical ACS camera on board the Hubble Space Telescope. The survey was designed to focus on two critical epochs in cosmic evolution: (1) At "Cosmic Dawn", less than 1 billion years after the Big Bang, the first seeds of cosmic structure began to take shape; (2) At "Cosmic High Noon", 2-4 billion years after the Big Bang, galaxies went on a growth splurge as huge gravity-driven rivers of gas flowed into them along the "cosmic web". The CANDELS team included IPAC scientists and data processing and analysis of the survey's UV component (in GOODS North) was led by IPAC.