EW YORK (AP) — New York City residents are accustomed to warnings about all kinds of potential threats — severe weather, public health, mass shootings. But a new PSA on surviving a nuclear attack has rattled some cages. Released this week by the city’s emergency management agency, the 90-second video advises citizens to stay indoors and wash off any radioactive dust or ash. It opens on a computer-generated street, devoid of life. Damaged skyscrapers can be seen in the background.