Missile Launch

Some press reports from Japan say that N.K. has fueled some long-range ballistic missiles. N.K. might be planning more missile tests but there is some speculation whether the missiles will be launched or not. If missiles are launched, what will be the reaction from other countries? What would be Washington's response? According the article the "United States, in particular, said the launching of the Taepodong-2 will compel it to take action."