At 31, Dalton’s cough was called post-viral. It was stage 4 lung cancer.

Dalton was 31 and training for a marathon when a lingering cough turned out to be stage 4 ALK-positive lung cancer. For weeks, speaking triggered such painful coughing that he communicated through an app. Then came a blood test result that opened up another treatment option—and a morning his husband Dustin will never forget.