For this reason, traffic became the single biggest threat to rider safety during the ride.

The risk of a nuclear attack still poses the greatest single threat to our survival.

And yet she remains the single greatest threat to the continued rule of the generals.

Habitat loss remains the single largest threat to species worldwide.

It represents the single most serious threat to natural habitats.

Pollution is seen as the single most important environmental threat by 62 percent of the adults surveyed.

They may be the biggest single threat to the allied forces in the gulf.

Habitat loss may be the single biggest threat to the grizzly.

"We're going to take every single threat that has any chance of being credible seriously, and do exactly what we did," he said.

"It's the biggest single threat to our budgets across the state," he said.