Steve Witkoff, one of President Donald Trump’s top envoys, is expected to have a busy week meeting with Iranian officials to discuss a possible nuclear deal, in addition to conversations with Russian and Ukrainian officials about trying to end the largest ground war in Europe since World War II.

Witkoff and Iranian Foreign Minister Abbas Araghchi are expected to meet on Friday in Istanbul, Turkey, according to Axios, though the meeting could still fall through. This potential conversation could provide both countries with an off-ramp to avoid a larger conflict amid the tension between them.