USA aegis missile defence system failed to intercept an incoming hostile missile.

https://sg.news.yahoo.com/missile-test-fail-u-unable-091712478.html

The effectiveness of the USA missile defence system is overstated by the USA.  The latest test showed that the Aegis defence system failed to intercept a simple incoming missile.  If the missile carries multiple warheads, the Aegis cannot protect the country at all.