bbc news, berlin. it s the turn of australia, india, and japan to meet with us presidentjoe biden in washington on friday when he hosts the first in person meeting of the quadrilateral security dialogue, or quad. this network came together in may 2007 and formed an alliance to share information on intelligence and defence. what s never formally on the agenda, but certainly dominates the discussion and thinking, is china. joining us from beijing for some analysis on all this is tom rafferty, regional director, asia at the economist intelligence unit. wait to have you on the programme. this meeting is really about the one country who isn t in the room, china. yeah, china is the elephant in the room. never referred to in