TIMELINE - Bin Laden messages since September 11, 2001

(Reuters) - Al Qaeda leader Osama bin Laden said in a video issued ahead of the sixth anniversary of the September 11 attacks that the United States was vulnerable despite its economic and military power.

It was not clear when the tape, acquired by Reuters Television from a web trawler in Europe, was made.

Following is a chronology of major statements attributed to bin Laden.

September 24, 2001 - Al Jazeera television quotes bin Laden statement urging Pakistanis to fight any assault on Afghanistan by "crusader Americans".

October 7 - Bin Laden taunts "infidel" Bush over September 11 attacks; says in a videotape shown by Al Jazeera that U.S. will not live in peace until Palestinians can do the same.

November 3 - Bin Laden video shown by Al Jazeera calls Muslims supporting Bush's Afghanistan "crusade" apostates.

December 13 - Bin Laden says was optimistic about September 11 attacks but dared not hope they would bring down World Trade Center towers, according to video U.S. says confirms his guilt.

December 26 - Bin Laden says in video on Al Jazeera that September 11 attacks intended to stop U.S. support for Israel.

January 31, 2002 - CNN airs October 11 interview by Al Jazeera reporter in which bin Laden says "battle has moved inside the United States".