The observation deck on the 107th floor of New York's World Trade Center has been reopened to tourists, nearly two months after the blast that killed six people and injured more than 1,000.
The deck figured prominently in early reports of the blast because a group of touring schoolchildren was there at the time.
Soot and other smoky residue had to be cleaned up before the reopening atop the center's south tower.
Stanley Brezenoff, head of the Port Authority of New York and New Jersey, owner of the twin towers, said security has been tightened. Visitors to the observation level now are subject to a random bag-check in the first-floor lobby.