Is Metra ready for the upcoming cold?

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Metra spokesman Michael Gillis defends the performance of the commuter rails during the polar vortex earlier this month. Gillis also goes over some of the precautions Metra is taking this week to prepare for a similar cold snap.

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Passengers board a Metra train on the BNSF line in Union Station on Friday, Nov. 11, 2011. (Brian Cassella / Chicago Tribune)