Given a text, write a compressed version of it in a single sentence.

The slaughter in Colombia was very much on the minds of 450 editors and publishers from Latin America, the United States, the Caribbean and Canada attending the 45th general assembly of the Inter- American Press Association in Monterrey, Mexico, this week.
450 editors and publishers from Latin America, the US, the Caribbean and Canada attending the 45th general assembly of the Inter- American Press Association in Monterrey, Mexico, this week.