The second workshop to discuss the development of liquid argon time projectionudchambers (LArTPCs) in the United States was held at Fermilab on July 8-9, 2014. The workshopudwas organized under the auspices of the Coordinating Panel for Advanced Detectors, a body thatudwas initiated by the American Physical Society Division of Particles and Fields. All presentationsudat the workshop were made in six topical plenary sessions: i) Argon Purity and Cryogenics, ii)udTPC and High Voltage, iii) Electronics, Data Acquisition and Triggering, iv) Scintillation LightudDetection, v) Calibration and Test Beams, and vi) Software. This document summarizes the currentudefforts in each of these areas. It primarily focuses on the work in the US, but also highlights workuddone elsewhere in the world.
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