Is Filene's Basement travel still in business?

the role of travel agencies in business travel is to provide things such as accommodation, transport and flights to businesses.

Yes, YTB Travel is still in business. As a matter of fact it is stronger and more active than ever.

Yes!

Hoechst acquired Celanese many years ago in the late 80's or early 90's. A number of years later they divested Celanese into the public market. A few years after that Black Stone took Celanese...

No, Wetterau is no longer in business. They sold out to Supervalu in 1993.