YOU SAID:

going on an airplane has been complicated since 9/11/2001

INTO JAPANESE

2001/09/11 以来複雑されている飛行機で行きます

BACK INTO ENGLISH

Flying has been involved since 2001 / 09 / 11.

INTO JAPANESE

2001 年以来飛行に携わってきました/09/11。

BACK INTO ENGLISH

Has been involved in flying since 2001 / 09 / 11.

INTO JAPANESE

2001 年以来飛行に関わってきた/09/11。

BACK INTO ENGLISH

Has been involved in flying since 2001 / 09 / 11.