In multiple Bay Area cities, police and fire departments will commemorate the 20th anniversary of 9/11 on Saturday with service events, flag ceremonies and memorials.

Without air-refilling stations in San Jose’s highrises, firefighters say they’d have to lug metal oxygen tanks up flight after flight of stairs. 

Sunday will mark the 10th anniversary of September 11, 2001, better known simply as 9/11. There will be memorial events held here in San Jose, throughout the nation and even outside the United States, as the 3,000 men, women and children who lost their lives that day from terrorist attacks on the World Trade Center, the Pentagon and Flight 93 are honored. Every generation has its “where were you?” moment, when something monumental happened and in the blink of an eye a person can recall exactly what he or she was doing. That tragic day 10 years ago is exactly that moment for many Americans.