I pray for all first responders and especially for the policeman who report to their shifts not knowing what violence may face each of them.
God was so disappointed in His created humans when he instructed Noah to build the Arc. The violence and evil all over this globe may be bringing us to the end, but none of us know when.
Christians should pray for our merciful God to bless humans all over this world, many of whom are suffering from the many recent tragedies and now the Las Vegas mass shooting, which was evil, no matter from where it came.