Missile launch or not

[Commando]

I got a problem with philcommandos icbm and silo stuff and a mission of mine.
I made a trigger that when west is detcted by east the doors begin to get closed to the missile silo and a a.i soldier runs to the Icbm to activate it but i would like to stop some hint messages and the soldier running to the icbm if the icbm is destroyed so i wonder how do i do that?
I got one trigger saying that if the icbm and the soldier is killed the ojective is done but i also got a switch trigger saying that if east detctes west then the alarm goes and a hint box says that they are preparing to launch the icbm...even though the icbm could be destroyed i still get the hint box saying that they are preparing to launch the missile.  

[KyleSarnik]

for the condition of the west detected by east put:

this and alive icbm

or what ever you nammed the icbm.