CNN interviewed former hostage Aviva Siegel. Israelis held somber ceremonies on Monday to mark a year since the deadliest attack in the country's history, a Hamas-led raid that shattered its sense of security and ignited wars on two fronts with no end in sight. Hamas marked the anniversary of its Oct. 7, 2023, attack by firing a barrage of rockets at Tel Aviv, underscoring its resilience after a year of war and devastation in Gaza. Lebanon's Hezbollah, which began firing rockets at Israel on Oct. 8 in support if its ally Hamas, vowed to keep up the barrages despite its recent losses. The surprise cross-border attack one year ago — which caught Israelis unprepared on a major Jewish holiday — shook their faith in their leaders and their military, and its aftershocks are still rippling across the region. Around 100 hostages captured that day have not been returned, a third of whom are believed to be dead, and cease-fire efforts have ground to a halt. The war in Gaza rages on and Israel is fighting a new war against Hezbollah. There is also an escalating conflict with Iran — which backs both Hamas and Hezbollah — that threatens to drag the region into an even more dangerous conflagration. No formal commemorative event is planned in Gaza, where fighting is still underway, huge areas have been completely destroyed and most of the population have been driven from their homes. In Lebanon, meanwhile, an Israeli strike in the country’s south killed at least 10 firefighters, according to the Lebanese Health Ministry. It said they were in a municipality building in the town of Baraachit that was hit as they prepared to embark on a rescue mission. Israelis flocked to ceremonies, cemeteries and memorial sites around the country, remembering the hundreds of victims, the dozens of hostages still in captivity and soldiers killed in battle. Commemorations were also planned across Europe and elsewhere. Hamas-led militants killed some 1,200 people, mostly civilians, in the Oct. 7 attack and abducted another 250. More local videos here: https://bit.ly/2Pa0d1l Subscribe to NEXT: http://bit.ly/2eP1GwI Stay connected: 9NEWS Website: http://www.9news.com/ Facebook: https://www.facebook.com/ilike9news Twitter: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.