Photos of the high-stakes Iran nuclear talks held in Istanbul earlier this month tell their own story.

In them, the top two negotiators — European Union foreign policy chief Cathy Ashton and Iran’s top nuclear negotiator, Saeed Jalili — stand smiling in front of a mural depicting Istanbul’s bridge over the Bosporous, wearing what almost looks like yin/yang versions of each other’s outfits.

Jalili is in the Iranian male uniform of black suit and white, collarless shirt; Ashton wears black pants and a cream blazer over a black top, with a white scarf discreetly wrapped around her neck and shoulders. In one photo, Jalili looks to be genuinely amused and grinning as Ashton, arms outstretched in a “ta-da” pose, moves toward him for a photo spray. What a contrast from a year ago, when a strained-looking Jalili stood, eyes averted and brow furrowed, at a clear distance from Ashton.

Unusual for such talks — and particularly novel for the Iranians — Ashton is but one of three high-powered women who are the principal interlocutors for what is known as the P5+1 — the five permanent members of the UN Security Council plus Germany.