The BBC's Panorama looks at the rise of semi-official homeless tent-camps in American cities. These are springing up in states where austerity "balanced budget" drives are severely cutting services. Especially concerning is the report of homeless children who are going hungry, going to bed hungry, getting dizzy from hunger, waiting through the weekend to go to school (with subsidized meals) to eat. City services -- shelters, emergency rooms, police -- actually send people to the tent cities, because there is no official place for them to go.
According to census data, 47 million Americans now live below the poverty line - the most in half a century - fuelled by several years of high unemployment.
One of the largest tented camps is in Florida and is now home to around 300 people. Others have sprung up in New Jersey and Portland.
In the Ann Arbor camp, Alana Gehringer, 23, has had a hacking cough for the last four months.
"The black mould - it was on our pillows, it was on our blankets, we were literally rubbing our faces in it sleeping every night," she said of wintering in a tent.
The camp is run by the residents themselves, with the help of a local charity group. Calls have come in from the hospital emergency room, the local police and the local homeless shelter to see if they can send in more.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.