During the Trudeau-Obama talk in D.C., it was clear that amongst the lobbyist and government relations crowd at the talk, there appeared to be a heightened sense of anticipation for this visit; above what one would normally expect for a run of the mill head of state visit. And this is good news for Canada with Trudeau as PM.
The Iranians allegedly do not want talks to break down because of a likely Israeli air attack, which though it would not be permanently incapacitating, would do great damage, retard development, and could be repeated as needed at intervals. The Vienna talks will have one more session before breaking for the summer. Though no one seriously expected that they would achieve an agreement, the Iranians have apparently put their program on hold, without rolling it back very far.
The sanctions noose around Iran fully tightened at the beginning of July as the European Union joined the United States to impose a total embargo on all purchases of Iranian oil and place severe restrictions on the country's central bank. As the likelihood of war increases it is important to ensure that the nuclear issue does not overshadow human rights concerns.