They hope to 'build a bridge' between the two cultures. [=they hope to help the people in the two cultures understand each other]
I don't know how we'll pay the bills if you quit your job, but 'we'll cross that bridge when we come to it'.
We had our differences in the past, but that's all 'water under the bridge' now.
(..) - What? - Why don't you just fuck off. - What? What'd you say, Rip? If you have any trouble, I'll be on the bridge. - Son of a bitch. - What's the matter? Can't see a goddamn thing. - Quit griping. - I like griping. (..)1979 Alien