🖋 Frank Gardner, BBC Security Correspondent and

John Dennison, BBC correspondent in Jerusalem

Saturday's ground attack on King Khalid International Airport in Riyadh marks another dangerous moment in a region that is currently riddled with tension and conflict.

Saudi Arabia was not prepared for such an event.

In recent weeks, the Houthis have increased their attacks on the territory of Saudi Arabia, but their attacks in recent days have targeted the country's vital infrastructure, including the capital's main airport, and it seems that they easily passed through the Saudi air defense systems.

Physical damage can be quickly repaired, but the credibility of this country as a safe and stable haven is crumbling.