A report that a major US airline is carrying weapons parts for Israeli defense firms aboard passenger planes has raised alarm that civilian jets could become targets.

• The Intercept reported that United Airlines cargo shipments of weapons material are headed to Elbit Systems facilities in Israel.
• Documents point to several separate shipments, not a one-time exception.
• Mixing arms with passenger luggage could give Iran, Hezbollah, or the Houthis a reason to treat civilian airliners as legitimate military targets.
• The US already has military transport planes for this, so the choice looks like cost-cutting — or something worse.
• There is worry the exposure is deliberate, setting up an attack on an American jet that could then justify escalation.

Outlook: Pressure will build on United and other carriers to publicly refuse these shipments before any aircraft is hit.