How many millions of U.S. viewers watched the episode directed by Rob Bailey and written by Pam Veasey?
create table table_12570759_2 (us_viewers__millions_ varchar, directed_by varchar, written_by varchar, PRIMARY KEY (us_viewers__millions_))
select us_viewers__millions_ from table_12570759_2 where directed_by = "rob bailey" and written_by = "pam veasey"