The US Chairman of the joint chief's of Staff Admiral Michael Mullen is arriving in New Delhi later tonight on a two day visit to India. Official sources said that he is expected to hold parleys with Defence Minister A.K. Antony, National Security Adviser Shivshankar Menon and other top Indian military brass. The changing dynamics in the volatile Af-Pak region and the terrorism emanating from it, besides other security issues of mutual concern is likely to remain high on agenda during the talks. The talks assume importance as they take place close on the heels of us special representative to Afghanistan and Pakistan Richard Holbrook and ahead of the Us President's visit to India in November this year.