As the Smithsonian Museum of Natural History unveiled its new David H. Koch Hall of Human Origins, several Greenpeace activists posing as the "Climate Crime Unit" rolled up in green emergency vehicles and passed out "Wanted" posters for billionaire energy magnate brothers David and Charles Koch.

Although the whole thing looked semi-official, most of the passers-by in front outside the museum did just that (perhaps because the lead investigator guy, who was obviously enjoying himself, opened with lines like, "do you have a minute to cooperate with our investigation? It will be brief and entertaining.").

But good times aside, Greenpeace says that Koch Industries is among the biggest lobbying spenders in the oil industry and Koch’s political action committee spent more on contributions to federal candidates since the 2006 election cycle than any other oil-and-gas sector PAC.

Greenpeace also says that the Kochs "funnel millions of dollars through their three 'charitable' foundations to a whole bunch of the worst climate deniers, like the Cato Instititute and the Heritage Foundation."  From 2005 to 2008, the Koch foundations gave over $24.8 million in funding to climate denial groups, more than ExxonMobil, which donated a hefty $9.1 million to similar organizations over the same time span.

Before the activists/investigators were able to find their men, however, people started asking questions of their own about the strange investigation going on in front of the Smithsonian and the Greenpeace Climate Crime Unit hastily called off its "investigation", closed up the crime scene and sped away.  Watch it:

[youtube]http://www.youtube.com/watch?v=HHm_8Qw_qSs&feature=player_embedded[/youtube]