The Intelligence: Air strikes on Houthi rebels

America and its allies delivered on a threat to retaliate against Houthi rebels in Yemen who have been targeting Red Sea ships. How far will the escalation go? We visit Iowa ahead of the first event of America’s presidential-primary season and ask if any surprises await (10.16). And remembering Mike Sadler, one of the first recruits to Britain’s SAS special forces (19.17).

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