south korea's defense ministry confirmed that north korea test-fired a missile from its east coast on wednesday, but said that the test appeared to have failed.`north korea fired one missile from an area near the wonsan air base this morning but it's presumed to have failed,` the ministry said in a brief statement according to south korea's yonhap news agency. `our military is prepared for the possibility of north korea's provocation including an additional missile launch,` it added.the u.s also confirmed the test-firing, reuters reports. `a missile appears to have exploded within seconds of launch,` commander dave benham, a spokesperson for u.s. pacific command said in a statement, adding that a more detailed assessment of the launch was underway.wednesday's test comes amid escalating tension between washington and pyongyang, and as u.s. and south korean troops conduct annual joint military drills on the peninsula. these drills are regarded as a rehearsal for invasion by north korea. earlier this month, north korea fired four ballistic missiles into the sea off japan's northwest coast, and conducted rocket-engine function tests that seoul said showed `meaningful progress.`as a counter-measure to north korea's nuclear and missile threat, reuters reported monday that the trump administration was considering imposing deeper sanctions that would freeze pyongyang out...