Rising Tide

When Superstorm Sandy killed 24 people on Staten Island, Congressman Michael Grimm worked night and day to help constituents who lost loved ones and were left homeless by the storm. In Sandy’s wake, Grimm, a conservative Republican, didn't believe humans have much to do with global warming. Correspondent Chris Hayes follows Grimm for a year to see what he can do for the residents of Staten Island – and what he might learn about climate change.