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The converging health issues of heroin addiction and HIV have emerged as a public health emergency in Puerto Rico

Puerto Rico has an HIV/Aids infection rate nearly four times the US national average – and over half of these come from injection drug use

The man behind a project to create the world's first printable gun plans to test its first prototypes in the coming months

Panel of experts in New York warns next six months are critical for putting public opinion behind infrastructure improvements

Filmmaker Oliver Stone and author Peter Kuznick talk about The Untold History of the United States, their new 10-part TV documentary and book of the same name

The last Saturday before Thanksgiving is National Survivors of Suicide Day – and Manuella Douglass is at the forefront of suicide research

The fundraiser for Breezy Point – the Queens town that lost more than 80 homes to fire and flood during the storm – was held in New York City at SPiN, the ping-pong social club Sarandon is co-owner of

Liberals scored a slew of pioneering victories in drug legalisation, gay marriage and diversified representation

Punk band's singer talks about the nature of art, beards – and what happens when you grow up and move to Brooklyn

The Guardian teamed up with Tumblr to bring you coverage of the final Obama-Romney presidential debate in gifs. Obviously

The Guardian and Tumblr teamed up to present the best of the action in live gifs. Here's a selection of the finest of them

My Little Pony is a hugely popular television series – but not with the audience you might expect. The Guardian travelled to New York Comic Con to find out about its unusual fanbase