, Called on US President Barack Obama, Americans, on Sunday in the 15th anniversary of the September 11 attacks to the acceptance of diversity in the country and do not allow for "terrorists" by dividing it.
He said in the anniversary ceremony at the Pentagon: "our diversity and common heritage is not vulnerable, but still and will always be one of the largest sources of our strength."
He added: "This is the America that was attacked that morning September. This is the America that we must preserve it."
Obama said that "al-Qaida and the organization Daesh knew that they would never Asttie defeating a powerful nation like America, at a time trying to practice terrorism in the hope that leads us to fear that one stand in the face of the other."
In an indirect reference to the proposals the Republican candidate Donald Trump's controversial, Obama said that people "came from all parts of the world, of all colors, all religions," made America what it is today.
The US president has repeatedly denounced and severely speech the Republican candidate to the White House. In the wake of the shooting in San Bernardino, California, in December last, Trump suggested that temporarily prevents Muslims from entering US territory.
He said Obama that since the September 11, 2001 attacks, "the evolution of the threat."
He continued touching to attacks Boston, San Bernardino and Orlando that "terrorists are trying to often carry out attacks on a small scale but remain deadly."
The Americans are prepared to commemorate the fifteenth anniversary of the Sept. 11, 2001, lists the names of the victims and the bells of churches and make a presentation with lights in the collapsed towers site in New York City.
The relatives of the victims will read the names of 2983 people on the background music was played during the commemoration ceremony in the courtyard of the attacks September 11 Memorial area of ​​Lower Manhattan that permeate the ceremony six minutes of silence.
Symbolizing four minutes of the six specific timing in which hijacked planes crashed into the World Trade building and the Pentagon Centre Pentagon near Washington and a field in Pennsylvania. Adakkaguetan and the other two refer to the timing of the collapse of the north and south of the center of the twin towers of the 
World Trade.
And killed more than 340 firefighters and 60 police officers on Tuesday, September 11, 2001 morning in the worst attack on American territory since the bombing of Pearl Harbor in 1941.
And met with many of them died while jogging on the stairs in search of victims may be trapped in the upper floors of the towers.
In his weekly radio address on Saturday, President Obama said he was one of more days in the darkness of the nation's history, but at the same time highlights the core values ​​and flexibility displayed by the American people.