Aid workers struggling to help survivors of Typhoon Haiyan in the Philippines have described the situation as bleak, one week after the storm tore into the country.
A spokesman for Medecins Sans Frontieres said the logistical issues of distributing aid were enormous.
However, correspondents in the ruined city of Tacloban say US military aircraft are beginning to bring in aid.
Philippine officials say the death toll has now risen to 3,621.