in. and they have to make sure that they can work well side by side. zain? >> and speaking of eventuality, north korea is working tirelessly to modernize its missile capabilities. how do these drills take into account north korea's ever growing military might? >> reporter: well certainly, this is the season for military drills. so the fact that we have seen an increase potentially in what north korea is doing is not necessarily surprising. you've got the winter coming into the springtime. this is prime time for these militaries to be test firing, to be trying out what they want to perfect. and of course we are seeing of course on the very first day of these military drills north korea test firing two short-range ballistic missiles. they've test fired new technology as well. and seoul and washington will be watching that very carefully to see what their capabilities are. and inevitably they'll be honing their skill to counter