Instead of adhering to hooves, the trampled snow forms a perilous kickback cloud fired into the path of the jockeys, who also need protection.

CNN: Cool racing: Horses battle on snow

In addition to appearing with Mr. Obama, the governor has cut his own path on policy issues, favoring some forms of gun control and agreeing to accept a federal Medicaid expansion, which most GOP governors have rejected.

WSJ: Christie and Obama Bond Again, Raising 2016 Questions

Sustainable forms of energy can also play a key role in income generation - a primary path out of poverty for the millions who do not have access to reliable grid-distributed electricity.

BBC: Powering our way out of poverty

The success of this approach would depend not only on the path the asteroid is expected to take, but also on how the material that forms it is bound together.

ECONOMIST: Private efforts to avert disaster in space