a little bit later on. it's saturday the 11th of september. our top story. president biden has appealed for national unity as he leads memorial events today marking the 20th anniversary of the 9/11 terror attacks. the president and first lady will visit new york, washington and pennsylvania, where the four hijacked planes were crashed — killing nearly 3,000 people. our us correspondent nomia iqbal reports. twin beams of light shoot up into the new york 5ky. a5 is tradition, they will shine from dusk till dawn to remember those who died on 9/11. and in a speech ahead of his arrival in the city, president biden reminded america of a time when it was united. the days that followed september 11, 2001, we saw heroism everywhere, in places expected and unexpected. we also saw something all too rare — a true sense of national unity. unity and resilience.