US Defense Secretary James Mattis was asked if the US and its allies planned to continue military operations beyond tonight's strikes in Syria.
He said it all depends on Syrian leader Bashar al-Assad.
"Should he decide to use more chemical weapons in the future and of course — the powers that have signed the chemical weapons prohibition have every reason to challenge Assad if should he choose to violate that, but right now this is a one-time shot and I believe that it sent a very strong message to dissuade him to, to deter him from doing this again."
What Trump said earlier tonight
However, earlier tonight, Trump indicated the strikes would continue until the Syrian regimes use of chemical weapons ends.
"We are prepared to sustain this response until the Syrian regime stops its use of prohibited chemical agents," Trump said.