Nothing will happen until China gets serious.
Via USA Today:
The Senate approved new sanctions Wednesday against North Korea to make it harder for the reclusive nation to access funds to develop long-range missiles and nuclear warheads. The House passed a similar measure last month.
Yet any sanctions Congress imposes are unlikely to deter North Korea, which fired a long-range rocket on Sunday and conducted a nuclear test last month in violation of U.N. resolutions. The reason sanctions are ineffective: China.
China is the financier: Most banks that North Korea uses to finance trade, imports and weapons programs work through China, said Richard Fisher, vice president of the International Assessment and Strategy Center.