the historic law signed by president biden today named in honor of emmett till that many say was long overdue >> announcer: this is "nbc nightly news" with lester holt. good evening it may be too early for the world to hold its breath, but we start with what could be optimism coming from ukraine specifically from a negotiating table in istanbul. russia announcing they will drastically reduce military operations near kyiv to increase trust. trust is in short supply as russian missiles struck elsewhere, american military officials saying signs of movement may be repositioning of russian forces after failing in attempts to take ukraine's seat of power british military analysts say ukrainian fighters were seeing some success with localized