Is the value of the trans-Alaska pipeline system $2.8 billion, or $10.3 billion? Or is it $20 billion?

Alaska’s economic development agency, AIDEA, wants to conduct geologic testing on its existing oil leases — and to bid on new ones — in the Arctic National Wildlife Refuge.

Candidates tell us how they'd respond to threats like typhoons and thawing permafrost, and with whom they'd want to dine — living or dead.