WASHINGTON (AP) — It's not a day for speech-making. Instead, President Barack Obama has wrapped up his visits to the three sites of 9/11 attacks by silently laying a wreath at the Pentagon.

He did the same earlier today in Shanksville, Pa., where United Flight 93 plunged to the ground. This morning, at the new memorial to the victims at ground zero, Obama read Psalm 46 from the Bible -- one that he chose because it speaks of perseverance through challenges. And he touched the names of victims, etched in bronze at a memorial pool.

At the Pentagon, he laid a wreath at a memorial where each of the 184 victims of the attack there is remembered with a bench and a small reflecting pool. A military band played "Amazing Grace" as the president greeted visitors to the memorial.

Obama's only planned public remarks today will come at a memorial concert in Washington in the evening.

(Copyright 2011, The Associated Press)