Pope Francis is greeted warmly as he arrives in Luxembourg to begin a rare trip to Europe:::: Luxembourg:: The pontiff prefers going to countries never visited by a pope or where Catholics are a small minorityThe Thursday-Sunday Luxembourg and Belgium tour comes less than two weeks after Francis returned from a demanding 12-day,

Pope Francis on Thursday called on leaders in Luxembourg - a small nation with a thriving economy and the highest density of millionaires per capita in the world - to devote resources to help improve conditions in developing countries.

Within 8 hours after registration opened, more than 10,000 people had applied for one of 650 available spots for the meeting with Pope Francis in the Luxembourg cathedral.