Pope Francis has kicked off his historic U.S. tour. During his six-day trip, Francis is expected to share his message of compassion and simplicity with the world’s richest and most powerful country. On Tuesday, both President Obama and Vice President Joe Biden personally greeted Pope Francis on the tarmac with their families after his plane landed at Joint Base Andrews near the capital. This is the first time the Argentina native has ever stepped foot on U.S. soil. We’ll have more on the pope’s visit after headlines.