This is your original post where you said your sister in law worked at the WTC.
Are you now saying that she worked at the WTC, but was not at work at the time because she'd been evacuated,
or on her way to work,
or had the day off but lived in the area, or was doing some shopping in the area on her day off.
As for what she claims to have seen, all I could tell her is that it wouldn't have been a Boeing 767.
Yeah thousands and thousands of people witnessed with their own eyes (not on TV pictures) that is wasn't a 767 and they've all kept quiet about it.
Not one person can be found to tell the truth.