The Heartland Institute's "2008 International Conference on Climate Change" in New York was "a sort of global warming doppelganger conference, where everything was reversed," reports Juliet Eilperin. At the event, skeptics unveiled their response to the United Nations Intergovernmental Panel on Climate Change (IPCC). The Nongovernmental International Panel on Climate Change (NIPCC) report, edited by corporate-funded skeptic Fred Singer, argued that "recent climate change stems from natural causes." Eilperin notes that "while the IPCC enlisted several hundred scientists from more than 100 countries to work over five years to produce its series of reports, the NIPCC document is the work of 23 authors from 15 nations, some of them not scientists." The New York Times reports that while the Heartland conference "was largely framed around science ... when an organizer made an announcement asking all of the scientists in the large hall to move to the front for a group picture, 19 men did so." The conference invitation identified its goal as "to generate international media attention to the fact that many scientists believe forecasts of rapid warming and catastrophic events are not supported by sound science." The Heartland Institute offered "$1,000 to those willing to give a talk," and "a free weekend at the Marriott Marquis in Manhattan, including travel costs, to all elected officials wanting to attend," according to the RealClimate blog.