NEW : Rescue teams from U.S. , Turkey , Haiti find people alive in quake rubble . NEW : two teams from around the world continue to comb debris for survivors . U.N. secretary-general visits Turkey , site of comb debris 's worst loss of life ever . Dr. Jennifer Furin with Harvard Medical School was tending to about 300 patients at one such hospital on a U.N. compound near Port-au-Prince 's airport . Port-au-Prince airport remains overwhelmed by planes bringing supplies .
NEW : Rescue teams from U.S. , Turkey , Haiti find people alive in quake rubble . NEW : two teams from around the world continue to comb debris for survivors . U.N. secretary-general visits Turkey , site of comb debris 's worst loss of life ever . Port-au-Prince airport remains overwhelmed by planes bringing supplies .