WASHINGTON, D.C. - President Barack Obama is asking Americans to mark Tuesday's anniversary of the Sept. 11 attacks by remembering how far the nation has come since terrorists struck 11 years ago.

In his weekly radio and internet address, Obama asked Americans to remember those who lost their lives as well as the loved ones they left behind — and honor the first-responders who risked their lives to help.

Obama said America has come back stronger and al-Qaida is on the path to defeat.

The president also noted that the 9/11 anniversary is being commemorated Tuesday by public service activities in communities around the country.

In the Republican address, Sen. John Barrasso of Wyoming criticized Obama's presidency and asserts the nation isn't better off than it was four years ago under President Bush.