Before revision: The US FAA URL by 2020 to decommission roughly half of the 967 VOR stations in the US, retaining a "Minimum Operational Network" to provide coverage to all aircraft more than 5,000 feet above the ground.
After revision: The US FAA plans by 2020 to decommission roughly half of the 967 VOR stations in the US, retaining a "Minimum Operational Network" to provide coverage to all aircraft more than 5,000 feet above the ground.