Plenty enough to be a very viable threat.

Boeing has had little incentive to spend heavily to phase out one of its planes until there is a viable threat from Airbus.

"Until he reaches the level of a viable threat, let's not do anything which would foreclose any of our options."

The changes made impeachment a more viable threat to office holders should they breach their limitations.

Political and civil unrest posed a viable threat to the project, with featured cast and crew in a considerable amount of danger.

According to the report the pardon indicated that Assad no longer viewed the Brotherhood to be a viable threat.

The result was that superimpellors, which could not operate close to a sun, were not a viable military threat.

They're not viable threats to a guy like Cameron.

The union maintains that without the viable threat of being able to leave, a player has a weak bargaining position.

The pressure and viable threats of a proposed vote of no confidence in Martin ultimately forced his resignation.