U.S., Canada mark 25th anniversary of 9/11 attacks

<img src='https://i.cbc.ca/ais/f2bb07be-37aa-4384-a651-8834a6aab1e1,1789088256427/full/max/0/default.jpg?im=Crop%2Crect%3D%280%2C0%2C1920%2C1080%29%3B' alt='two people at the 9/11 memorial site' width='620' height='349' title='Dignitaries, survivors and their families are gathering in New York to mark 25 years since the attacks of Sept. 11, 2001.'/><p></p>