for more on that, let's go to harry fossett in seoul. >> reporter: president obama arrives in the country gripped by grief and a sense of national self-examination after the deaths of so many young people in the terrible ferry disaster last wednesday. his officials say he will make time in the schedule to express his sadness and sympathy about the event. he will lay a wreath at the war memorial in seoul and visit the grandest palace in seoul you see behind me. then there's the meat of this visit when he has extensive talks with the president. this is an opportunity for president obama to do what his officials say he'll be doing throughout this tour around asia saying the momentum is still very much behind the administration's rebalancing of its political, economic and military efforts here in asia. that's something that people in this region have been, to some extent, doubting with what's going on in syria and, of course, more recently in ukraine. the united states having to deal with these very serious issues in more traditional areas of interest. so that's something that the white house

. >>> a drone crashed on the south koreaen mainland, harry fossett reports from seoul. >> a camera equipment drone on a day the two sides traded artillery fire into each other's waters. >> the pow of the south korea government has concerns that north korea is responsible for it. >> reporter: north korea has been sizing its prowess of drones. this comes just days after a similar craft came down on the other side of the land border. the camera contained images of military installations and pictures of the president's were you house. we're standing just a few hundred feet away from the blue house. >> we are asking ourselves what if north korea is using the bomb instead of camera instead of aircraft? so there is a lot of controversy among the military that are needing strong measure against this kind of attack. >> reporter: south korea is willing to spend $8.4 million on four unman's aircraft. north korea's aircraft is old and give propensity to crash and unreliable but also giving south korean headaches. >> birds that are hurting from the drought zone. this will make their trip just a little ea

harry fossett reports from seoul. >> reporter: the president accepted the resignation of prime minister but not yet so he can work with other agencies on the rescue effort and the rest of the aftermath of the terrible national disaster. it's a sign the government feels under pressure from the anger of the parents of children dead and still missing and also from the wider electorate here in south korea, which is concerned about how this came to be. that's something that the prime minister addressed in his resignation speech. >> translator: the right thing for me to do is to take responsibility and resign. on behalf of the government, i apologize for many problems. from the prevention to the accident to the early handling of the disaster. >> reporter: on the day after it went down, south korea's president put him in charge of the rescue effort. as he supervised it, it put him in the firing line. literally at one point parents of missing children threw a water bottle and scuffled with him and again when they stopped his car from leaving the island of jindo. relatives were furious about del