Assertion: airspace | /r/HasProperty | closed
Facets:
value: in 1962
type: TEMPORAL
value: consequently
type: TEMPORAL
Source sentences:
text: To prevent any sightings, the airspace above the Groom Lake range was closed.
text: On the basis of this, the authorities made decisions about when and where airspace should be closed due to the safety issues.
text: The general approach taken by airspace regulators was that if the ash concentration rose above zero, then the airspace was considered unsafe and was consequently closed.
text: Passengers destined for countries where airspace was closed had to switch to other modes of transport, possibly via airports still open in Portugal, Morocco, and Turkey to the east.
text: In 1962 the airspace around Lake Groom was closed and a number of new aircraft were shipped in to the area.