the land ward side of the building. >> gretchen: horrific scene unfolding at the height of the morning commute when the thousands of people were trying to get to work. >> sound like a motor plane and we heard a loud explosion. we thought it was a terrorist attack and came straight out onto the main road and there was a huge plume of smoke. guys were running outside and shouted that a plane had flown into the crane. >> gretchen: at least nine other people are hurt. one of them, unfortunately, critically. another member of president obama's cabinet calling it quits now in a few hours. ken salazar expected to announce he'll step down as interior secretary. he's held the post for a little over four years. he came under fire for pushing more regulations on offshore oil and gas development. the 57-year-old says he's going to leave at the end of march to spend more time with his family in colorado. overnight two of japan's biggest airlines grounding all