A man scaled a portion of The New York Times' 52-story headquarters on Wednesday morning, becoming the third person to do so in a span of a few weeks, police said. The climber made it to the 11th floor of the building in midtown Manhattan before descending to a lower floor and spending hours making cell phone calls and talking to police. He was arrested about 5:30 a.m., police said. At one point, the climber unfurled a banner on the "T" of the Times' sign that referenced al-Qaida leader Osama bin Laden, the Times reported on its Web site Wednesday. Dozens of police and firefighters responded about 1:30 a.m. after the man was first spotted climbing the building, police said. Streets were closed off and an inflatable cushion was placed in front of the main entrance of the building.