US officials concerned over Pak retaliatory steps

According to the Wall Street Journal report US officials are concerned over steps that Pakistan might take in retaliation to NATO strike. They are pondering over the possible repercussion of NATO’s act of aggression.They believe the cut in NATO supplies is a very critical issue and in days to come it could further complicate the situation.It is being speculated that the US mulls over alternate routes to continue defence supplies from Central Asia.The real issue could prop up when Pakistan disallows the use of its air space to US.The US also mulls over stopping Pakistan aid to pressure it for withdrawing retaliatory steps