The entire country of Yemen isn’t worth one American life.
I don’t understand what you mean. Explain?
You grossly underestimate the significance of the country. The country borders one of the world’s busiest shipping lanes in the world on route to the Suez Canal in Egypt. Whilst the people may not be worth the vey life that was taken, the geographic significance of Yemen is of vital importance to the national security of the United States as most of the warships traverse these waters.