They cap the igloo by dropping a keystone, or block with edges cut wider above than below, into the remaining gap in the roof, and "grout" the gaps between blocks of snow with additional snow.

人们用拱顶石来盖顶，或者把雪块削切得上边缘比下边缘更宽，放进剩下的屋顶缺口里，再用雪来塞满雪块间的缝隙。

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"The pipeline has come to symbolize something much, much bigger than just one energy project, it's come to symbolize what is our energy future, and what President Obama is going to do on climate change, " said activist Jane Kleeb of the anti-pipeline organization Bold Nebraska, in a state where the Keystone XL project would cut through predominantly agricultural areas.

CNN: Keystone pipeline protesters arrested in Texas

The payroll tax cut is tied into a study on the Canadian Keystone Pipeline transaction, another complication to the argument.

FORBES: Is a 2 Month Tax Cut a Cut?

So the very people who support this idea want to include a provision in the payroll tax cut that would result in the State Department not approving -- or not recommending the approval of the Keystone project.

WHITEHOUSE: Press Briefing