Trump, other officials mourn Charlie Kirk amid September 11 tributes

New York and Washington marked the devastating attacks of September 11, 2001 on Thursday, 24 years after the deadly plane hijackings that claimed almost 3,000 lives and forever changed the United States. [AFP]

US President Donald Trump and other officials paid tribute to slain right-wing activist Charlie Kirk on Thursday as the country marked the 24th anniversary of the September 11, 2001 attacks.

Kirk was a "giant of his generation," and a "champion of liberty," Trump said at the beginning of his remarks during a 9/11 ceremony at the Pentagon, which was one of the targets of the Al-Qaeda attacks that sparked two decades of deadly conflict.