[EAS] Japan: testing J-Alert missile warning system finds problems

[Sean Donelan]

If you don't test warning systems, you won't find problems... until the 
warning system doesn't work in a real emergency.

Its better to find glitches and problems during testing.

https://www.japantimes.co.jp/news/2017/08/18/national/j-alert-drill-turns-glitches-municipalities-threatened-north-korean-missiles/

[...]
Some of municipalities in Friday's drill experienced technical glitches 
with the J-Alert system.
For example, in Yonago, Shimane Prefecture, the loudspeakers didn't work, 
and in Okayama, a text message sent by the prefecture ended up being 
garbled.
[...]