thing, tonight may, in fact, the night, so we train every night. reporter: still the same work they have done every day for decade. now with the world watching what happens next. alexandria field, cnn, osan base. nasa wants to get their hands on an app to help people track the solar e on clipclipse. we have a closer look next at how the doctor s app works. hey, is this our turn? honey.our turn? yeah, we go left right here. (woman vo) great adventures are still out there. we ll find them in our subaru outback. (avo) love. it s what makes a subaru, a subaru. get 0% apr financing for 63 months on all new 2017