Equally important to the ballistic range tests is the design of model and sabot.

模型及弹托设计是开展弹道靶试验研究的基础。

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While North Korea has a poor track record at successful long-range ballistic missile tests, U.S. intelligence officials have said Pyongyang is taking its time and making sure it's doing things right this time.

CNN: Analysis: Amid pending launch, N. Korea only shows half its hand

They do nothing but posture as the regime builds atomic bombs and tests medium range ballistic missiles.

CENTERFORSECURITYPOLICY: Narcissists and madmen

But Britain believes Iran has also conducted at least three secret tests of medium-range ballistic missiles since October.

BBC: William Hague concerned over Iranian missile tests