What is the significance of joint military operation in Syria?

The decision to strike Syria Friday night marked President Trump's second order to attack Syria. Last year, he authorized a barrage of missiles to hit a Syrian airfield. The U.S. acted alone. This year, the U.S. had the U.K. and France by its side. Jeff McCausland, national security consultant for CBS News Radio, joins CBSN to discuss the significance of this difference.

(Source: CBS News, https://www.youtube.com/watch?v=qFk8UQ6GJLo)