clark freeport zone philippines southeast asian defense minister monday express grave concern north korea nuclear missile program urge reclusive country meet international obligations resume communications north korea work develop nuclear-tipped missile capable strike u.s. mainland ignore call even lone major ally china rein weapons program conduct defiance u.n. security council resolutions defense minister association southeast asian nations asean joint statement underscore need maintain peace stability region call exercise self-restraint resumption dialogue de-escalate tensions korean peninsula due meet counterparts unite state china japan south korea india australia russia new zealand tuesday north korea dispute south china sea terrorism expect top agenda u.s. defense secretary jim mattis say talk asian ally north korea crisis cause reckless provocations mattis trip asia also include stop thailand south korea come weeks donald trump first visit asia u.s. president statement minister reiterate importance safety freedom navigation over-flight south china sea call self restraint conduct activities also vow work together combat terrorism condemn attack maute militant group southern philippine city marawi philippines monday announce end five months military operations marawi fierce unfamiliar urban war mark country big security crisis years southeast asian minister urge north korea rein weapons program