A security incident unfolded on Sunday as a car collided with a vehicle in Joe Biden’s motorcade, creating a startling moment for the US president and his team. The incident occurred as Biden was departing from his campaign headquarters in Delaware. A security incident unfolded on Sunday as a car collided with a vehicle in Joe Biden’s motorcade, creating a startling moment for the US president and his team. The incident occurred as Biden was departing from his campaign headquarters in Delaware.