San Juan, Puerto Rico, March 14, 2018 – James A. Mason,
San Juan, Puerto Rico, March 14, 2018 – James A. Mason, Ph.D., P.E., a structural and geotechnical engineer for the U.S. National Park Service, inspects the condition of the mortar between bricks of Fortín de S... More
San Juan, Puerto Rico, March 14, 2018 – Juan Vera Vega
San Juan, Puerto Rico, March 14, 2018 – Juan Vera Vega (right), Director of the Council of Nautical Archaeology of the Puerto Rico Institute of Culture, speaks to John Rosemurgy (center), U.S. National Park Ser... More
San Juan, Puerto Rico, March 14, 2018 – James A. Mason,
San Juan, Puerto Rico, March 14, 2018 – James A. Mason, Ph.D., P.E., a structural and geotechnical engineer for the U.S. National Park Service, inspects and probes (with knife) the condition of bricks and morta... More
San Juan, Puerto Rico, March 14, 2018 – James A. Mason,
San Juan, Puerto Rico, March 14, 2018 – James A. Mason, Ph.D., P.E., a structural and geotechnical engineer for the U.S. National Park Service, inspects the condition and moisture of brickwork (with a digital m... More