Pope says Mass at U.S.-Mexico border, honors migrants who've died crossing

Pope Francis stands on a praying platform on the banks of the Rio Grande in Juarez, Mexico, as he prays for a group of migrants sitting along the border fence in El Paso, Texas, Wednesday, Feb. 17, 2016. Pope Francis offered a prayer for the migrants who have died crossing the border. (AP Photo/Eric Gay)

Hundreds of people gathered a few yards away on the U.S. side watch as Pope Francis prays near the U.S.-Mexico border fence along the Rio Grande, in Ciudad Juarez, Mexico, Wednesday, Feb. 17, 2016. After a brief moment of prayer, Francis walked down the ramp and got back on his popemobile to head for the fairgrounds, where he celebrated his last Mass during a five-day Mexico tour. (AP Photo/Gregorio Borgia)

Migrants seated next to a border fence in El Paso, Texas, stand and cheer as Pope Francis arrives on the banks of the Rio Grande in Juarez, Mexico, Wednesday, Feb. 17, 2016. Francis made the sign of the cross and blessed hundreds of people gathered in El Paso. (AP Photo/Eric Gay)

Pope Francis is seen through U.S. border fence in El Paso, Texas, along the banks of the Rio Grande as he arrives in Juarez, Mexico, Wednesday, Feb. 17, 2016. (AP Photo/Eric Gay)

Pope Francis smiles and waves upon arrival at the US-Mexico border in Ciudad Juarez, Mexico, Wednesday, Feb. 17, 2016. After a brief moment of prayer, Francis got back on his popemobile to head for the fairgrounds, where he celebrated his last Mass during a five-day Mexico tour. (Gabriel Bouys/Pool Photo via AP)

Pope Francis prays near the U.S.-Mexico border fence along the Rio Grande, in Ciudad Juarez, Mexico, Wednesday, Feb. 17, 2016. Francis made the sign of the cross and blessed hundreds of people gathered a few yards away on the U.S. side.(AP Photo/Gregorio Borgia)

Pope Francis waves at faithful as he arrives for a massive open-air Mass in a park just a few meters from the U.S. border in Ciudad Juarez, Mexico, Wednesday, Feb. 17, 2016. Thousands of people from El Paso as well as other parts of the U.S. were expected to make the short trip over the various bridges that link the cities to attend the outdoor Mass that was expected to be attended by more than 200,000 people and will cap Francis' visit to the Latin American country. (AP Photo/Dario Lopez-Mills)