BBC News with Deborah Mackenzie.
President Obama has said the United States is mounting one of its biggest ever rescue efforts to help the people of Haiti after Tuesday's massive earthquake. He said thousands of troops were being sent to the country to join the growing international rescue and relief effort. Mr Obama also announced that the United States was providing an immediate relief fund of 100 million dollars which would grow over the year to aid long-term recovery.
"It's important that everybody in Haiti understand at this very moment one of the largest relief efforts in our recent history is moving towards Haiti. More American search and rescue teams are coming, more food, more water, doctors, nurses, paramedics, more of the people, equipment and capabilities that can make the difference between life and death."
Rescue specialists have been arriving with teams from China, France, Spain and the United States among the first to fly in. Aid supplies have also been arriving, but latest reports say the airport at Port-au-Prince is having difficulty handling the traffic, and some flights were suspended. BBC correspondents in the ruined capital say there is no sign yet of any organized relief effort. Our correspondent Nick Davis saw scenes of misery in the Haitian capital.
I'm just walking past a flatbed truck which has got dead bodies. I can't even count how many dead bodies wrapped in makeshift shrouds made of blankets. The stench is appalling. I'm having to block my nose. There are crowds of people all around, looking across at the cemetery. It's a mass grave. From where I am stood on this wall, I can see maybe 20, 30 or more bodies which are just lying there. I'm not sure exactly how these bodies are going to be disposed of. But at the moment, they're just in a pile at the edge of the cemetery.