United Nations September 24, 2024 11:24 am WATCH: President Biden's full speech at the United Nations President Joe Biden made his final speech to the United Nations General Assembly on Tuesday and spoke about support for Ukraine and challenges with artificial intelligence. US & World Videos 1:06 WATCH: Videos show Hurricane Helene's high winds hitting Florida 0:53 Helene makes landfall in Florida 1:55 Hurricane Helene carrying ‘record-breaking' moisture because of climate change 1:50 Biden on Hurricane Helene: ‘Take this seriously' 1:23 US suicides held steady in 2023, data shows