ABOARD THE PAPAL PLANE (AP) -- Pope Francis acknowledged Saturday that the Vatican has a 2,000-case backlog in processing clerical sex abuse cases and says criticism of the slow pace was justified. But he says more staff are being added and insists the Vatican is "on the right path." Francis was making his first comments about the criticism leveled at the Vatican's handling of sex abuse cases by Marie Collins, an Irish abuse survivor who resigned from Francis' sex abuse advisory commission in March. Collins quit because of what she said was the "unacceptable" level of resistance within the Vatican...