Through the introduction of interference on specific frequencies, the attacker can theoretically force the shutdown of control channels until there are none left.
The closures will not force the shutdown of any of those airports, but pilots will be left to coordinate takeoffs and landings among themselves over a shared radio frequency with no help from ground controllers.
In recent days, Clinton's defense of the nation's health program for the poor, elderly and disabled has become central to the budget debate, and could force another government shutdown if no agreement is reached by Friday.
The suspension is also likely to lead to a temporary shutdown of one nuclear plant operated by German utility EnBW AG, and if continued, may force another owned by RWE AG offline, at least temporarily, this year.