It would make sense for the US to share any intel on this with just about everyone since they alone cannot police things all around the world . What concerns me is -what reciprocity will there be , ie all pax traveling to Europe should face same restrictions as westbound pax and all US domestics the same . As has been pointed out on here the US doesn't need to import terrorism as it has enough of its own and detonating bombs on a flight from JFK to LAX is just as plausible as LHR to JFK and the US have been horrible caught out by the delusion that domestic flights are not a problem and seem to be slipping back into that mindset