India, June 17 -- As the United States and Iran prepare to formalise a historic memorandum of understanding at a ceremony in Switzerland this Friday, the path to a lasting peace is facing an eleventh-hour crisis. Tehran has issued a stern warning following a series of deadly Israeli airstrikes in southern Lebanon, accusing Israel of repeatedly violating the ceasefire arrangements that underpin the broader regional de-escalation.

Iranian officials have declared that the continued military operations constitute a "red line," threatening that any further aggression could trigger a "harsh response" and unravel the delicate diplomatic progress achieved with Washington.

Lebanon at the Heart of the Accord

The escalation, which saw four people...