four people laying blocks for the foundation of a building under construction

four people laying blocks for the foundation of a building under construction. Two men are kneeling and spreading mortar, while another carries blocks, and a fourth lays blocks in place. Rebar extends upwards from the foundation at intervals. The ground is uneven and mostly bare, with patches of grass and dirt. A finished building is visible in the background, as are the tops of buildings in the far distance. There are building materials, trash, and a water pipe on the ground in the foreground. The sky is overcast.