When the operators of Southern Seaplane in Belle Chasse, La., called the local Coast Guard-Federal Aviation Administration command center for permission to fly over restricted airspace in [the] Gulf of Mexico, they made what they thought was a simple and routine request. A pilot wanted to take a photographer from The Times-Picayune of New Orleans to snap photographs of the oil slicks blackening the water. The response from a BP contractor who answered the phone late last month at the command center was swift and absolute: Permission denied. "We were questioned extensively. Who was on the aircraft? Who did they work for?" recalled Rhonda Panepinto, who owns Southern Seaplane with her husband, Lyle. "The minute we mentioned media, the answer was: 'Not allowed.' " Journalists struggling to document the impact of the oil rig explosion have repeatedly found themselves turned away from public areas affected by the spill, and not only by BP and its contractors, but by local law enforcement, the Coast Guard and government officials. Scientists, too, have complained about the trickle of information that has emerged from BP and government sources. Three weeks passed, for instance, from the time the Deepwater Horizon oil rig exploded on April 20 and the first images of oil gushing from an underwater pipe were released by BP.