India, June 24 -- US Secretary of State Marco Rubio touched down in the United Arab Emirates on Tuesday, kicking off a high-stakes diplomatic tour aimed at soothing deepening anxieties among Washington's closest Arab allies.

The mission comes on the heels of a tentative ceasefire framework between the United States and Iran, an agreement that has left Gulf monarchies wary of a shifting regional power balance and the potential for a weakened security guarantee.

Rubio's arrival in Abu Dhabi marks the first leg of a three-nation trip that will also take him to Kuwait and Bahrain.

The tour follows intense, US-led negotiations in Switzerland, spearheaded by US Vice President JD Vance, which produced a memorandum of understanding (MoU) intende...