Exhaust-Only Ventilation Exhaust-only ventilation is the reverse of supply-only ventilation; stale air leaves the building from a known location (through exhaust fans ducted to the outdoors) and outdoor air enters the building from an unknown location.
In the 1960s, the Soviet Union began to prepare the Warsaw Pact for its internal function of keeping the NSWP member states within the alliance. The Soviet Union took a series of steps to transform the Warsaw Pact into its intra-alliance intervention force.
This invigorated NATO exercise activity is intended to assure allies and deter Russia, a policy the alliance underscored at its Warsaw Summit in 2016, and Washington affirmed with the European Reassurance and, later, Deterrence Initiatives.