The image of the former president of the United States, Bill Clinton, who appeared frail just before launching his new book at a literary event in Manhattan, New York.

The 78-year-old former president was spotted on video stumbling as he got out of a black vehicle and attempted to climb onto the sidewalk outside the 92NY Cultural Center. Clinton had to grab onto a pole to keep his balance and his left leg momentarily bent, causing him to stumble slightly.