Pope Francis on Sunday wrapped up a weekend trip to Belgium, where he faced some of the strongest criticism yet levied during one of his foreign trips. The 87-year-old pontiff was pressed by high-profile figures at three of the five major events on his three-day visit in unusual and sometimes fierce language for a papal trip.

Calling on the world's bishops not to cover up any instance or form of abuse, Pope Francis said the evil of abuse must be exposed.

In his homily during Mass Sept. 29 in Brussels, Pope Francis strayed from his prepared text to urge bishops to hide nothing, “condemn abuses” and assist perpetrators in getting help.