The U.S. attack on Saturday was launched as revenge for an alleged 'chemical attack' by the Syrian government forces against the then 'rebel' held Damascus suburb Douma. The alleged 'chemical attack' never happened but was theater staged by the 'rebels' and their supporters after some people suffocated in a collapsed building.

There is a very large discrepancy between the Russian Ministry of Defense report of the strike as well as other sources and the description in the Pentagon briefing on the strike. According to the Pentagon only three places related to a nonexistent Syrian chemical weapon program were targeted:

This combined military strike was directed against three distinct Syrian chemical weapons program targets.
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We are confident that all of our missiles reached their targets.
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In summary, in a powerful show of allied unity, we deployed 105 weapons against three targets.