Was US's operation against Kabul bombers just a gimmick?

Less than 48 hours after the Kabul airport attack that killed over 100 including 13 US soldiers, the US military conducted airstrikes targeting Islamic State in Nangarhar. The US claimed that a conspirator of Kabul airport attack was killed in this airstrike. But the question arises, is the US's operation against Kabul bombers was just a show-off? Watch this report.