In 1977, LAN merged with the Houston-based architectural firm, Koetter, Tharp, Cowell & Bartlett, Inc. (KTC). KTC operated separately until 1982 when it co-located as a division of LAN. The acquisition of KTC represented the achievement of a long-standing goal to develop LAN into a full-service professional design firm. Also in 1977, LAN opened an office in Saudi Arabia to establish an international presence and serve the project under construction at Al Dawadmi, Saudi Arabia.