Jaroslaw Kaczynski, right, Law and Justice party leader and twin brother of late Polish president Lech Kaczynski, prays at the Presidential Palace during a ceremony marking the 5th anniversary of the presidential plane crash near Smolensk, in Warsaw, Poland, Friday, April 10, 2015. The photograph at left shows Lech Kaczynski and his wife Maria, who also died in the crash. (AP Photo/Czarek Sokolowski)