Yunlont Wu watches through the window of Oshima Sushi Japanese Cuisine as construction crews work at the site of the Copper Lounge building collapse Tuesday, Dec. 6, 2016, in downtown Sioux Falls. Both Mama's Phried & Phillys and Oshima Sushi Japanese Cuisine on 10th Street between Phillips and Mall Avenues across from the site of the Copper Lounge building collapse opened Tuesday after having been closed since the collapse.