Cardinal Walter Kasper, an aide to Pope Benedict XVI, has said that landing at Britain's Heathrow Airport is like landing in a "third world country," reports BBC online Thursday. The cardinal has pulled out of a UK visit with the Pope, who is currently in the country visiting with the Queen. The leader of the Roman Catholic Church in England and Wales, Archbishop Vincent Nichols, said Kasper's comments are "inexplicable," and that the Pope would be welcomed by people of all backgrounds in London.