TOKYO — Japan grounded most of its aging military training aircraft on Wednesday after one of the planes crashed minutes after take off. Two crew are missing after the T-4 training aircraft operated by the Japan Air Self-Defense Force crashed after taking off from Komaki Air Base, in the central Japanese prefecture of Aichi, officials said. The force said the plane was lost from radar two minutes after departure. The authorities are searching for the missing aircraft and its crew in an area