降落途中解體了不清楚是不是因為什麼故障觸發了終止程序…Looks like engine 2 had issues on ascent & didn’t reach operating chamber pressure during landing burn,but, in theory, it wasn’t needed.Something significant happened shortly after landingburn start. Should know what it was once we can examine the bits later today.大概是要回收殘骸才知道怎麼了吧