North Korea's record year of missile launches has shown its willingness to pour resources into producing and deploying more weapons than ever - and sanctions have done little to hinder their development, analysts say. Last week the country fired more than 80 missiles, including its latest short-range ballistic missiles (SRBMs) and a new variant of intercontinental ballistic missile (ICBM), by far the North's most launches in such a short period. Although North Korean weapon costs are not known, ICBMs in other countries can cost tens of millions of dollars, and SRBMs such as Russia's Iskander up to $3 million. Analysts...