Obama urges Americans to unite on eve of 9/11's 15th anniversary Sep 11, 2016 0 1216 12345 AFPWASHINGTONPRESIDENT Barack Obama on Saturday urged Americans to remain united in the face of terrorist attacks, in a barely-veiled jab at Republican White House nominee Donald Trump 15 years after 9/11."In the face of terrorism, how we respond matters," Obama said in his weekly radio and online address, delivered on the eve of the 15th anniversary of the September 11 terror attacks in the United States."We cannot give in to those who would divide us. We cannot react in ways that erode the fabric of our society," he added."Because it's our diversity, our welcoming of all talent, our treating of everybody fairly-no matter their race, gender, ethnicity, or faith-that's part of what makes our country great. It's what makes us resilient," Obama said."And if we stay true to those values, we'll uphold the legacy of those we've lost, and keep our nation strong and free."On several occasions Obama has denounced Trump's bombastic rhetoric towards Muslims.Following the December shooting rampage in San Bernardino, California for example, Trump called for a temporary ban on the entry to the United States of all Muslims.Obama was speaking two months before the presidential election in which Trump will face Democrat Hillary Clinton.The Al-Qaeda hijackings of September 11, 2001 -- the first foreign attack on the US mainland in nearly two centuries -- ruptured a sense of safety and plunged the West into wars still being fought today.