Do I need to brace the rafters or are they self-supporting?

[Henrik Vamos]

I am going to tear down a partition wall and am unsure if the roof trusses need to be bridged.

The two red lines on the floor plan show the roof trusses that will only be supported by the outer walls now.
I am also attaching a drawing I found of the roof trusses' construction.

I am considering placing a beam in the attic between the two nearby in blue and anchoring the red ones in these.

Thoughts?