If the US stopped a sale it was likely an FMS (foreign Military Sales ) deal NZ receives a fair amount of US and British Military AID , Australia you may remember got a few squadrons worth of F 111 Arrdvarks after the gulf war ,along with 20 years of prepaid parts, ( we even overhauled them before we sent them). It was done to bolster the Air assets in the region, saves us setting up new bases. As soon as we withdrew parts and technical support they sent them to the bone yard ! The Current President placed a lot of returned from conflict and new Armoured vehicals in the hands of the municipalities and states in a program designed to BEEF up there capabilities in the war on terror. Some were kept the minimum time required by law and sold to private individuals. The Administration was suddenly concerned they might have nefarious purpose. So he has made an effort to STEM the flow. His current stance is that NONE of the armoured , amphibious or WAR MAterials export can be reimported. But the decision only really affects American made materials that were primarily lend / lease, yes still coming back from the second world war. Norway is a prime example, they were returning equipment ,Weasels , Trucks , ect in conditions of repair seldom seen here any more.
England and Germany are the only two countries to completely repay their war debts, England had a little left and it was forgiven on the Queens JUbilee in 1976/77. The biggest reason you see the decrease in Englands US Air Force foot print was the end of the Basing Rights Lend Lease 50 year deal for the Destroyers in the early (40s 40/41)! The big difference here is that in most states,similar to regions in the UK, New Hampshire, compared to Norfolk for example, have road laws that differs from state to state, New Hampshire for example does not allow tracked vehicles on the roads , even if rubber tracked , EXCEPT a half track for example , because its only "partially tracked" Unlike England where the emphasis for demil is on the ammunition, here the emphasis is on the ability to "send it down the tube" you could own a 155 HE round legally with the right Tax stamps and approvals , but to get a "stamp" for a live tube is very very hard, England historicly has aloud ,in the past, live tubes , but prevented the ammo from possion. Just a different mind set. So , you wont see a Scimatar Track rolling down the A 47 to Mildenhall here, unless on a flatbed!