The battle at the school continues on. Kato engages the RWS to keep anyone from leaving school grounds and then he deploys the Cube, a war machine, to aid in taking down Saruta.
If you get to the Ninja Lab 
fast enough, it can be reattached.
.إن ذهبت إلى مختبر النينجا بسرعة، يمكن إعادة زرعها
Se vai subito al Centro Ricerche, te lo riattaccano.
Se chegar logo no Laboratório Ninja,
eles grudam de volta.
Беги в Лабораторию,
там её тебе пришьют.