Unanswered questions on the nuclear swap

There are some important unanswered questions arising from the nuclear swap deal worked out among Iran, Brazil and Turkey. First, the deal in which Iran would swap 1,200 kilo of 3.5% enriched uranium for 120 kilo of 20% enriched uranium, says nothing about stopping Iran from enriching more uranium to the 20% level. And Iran says openly that it intends to continue to do so. What's seemingly