Journalists and conspiracy theories abound in Karachi

KARACHI (Reuters) - A huge billboard outside Pakistan's naval air force headquarters, which came under sustained attack for hours on Monday, says it all -- "Pakistan Air Force Museum. Unique experience."

Attacks against Pakistan security forces are all too common, but the scale of Monday's operation marked it out as the most audacious since the killing of al Qaeda leader Osama bin Laden by U.S. forces early this month.
Blasts rang out and helicopters hovered above the PNS Mehran base in the commercial hub of Karachi, for hours after more than 20 Pakistani Taliban militants stormed the building with guns and grenades on Sunday night, blowing up at least one aircraft.
The Pakistan Taliban, which is allied with al Qaeda, said the attack was to avenge bin Laden's killing. At least 12 military personnel were killed and 14 wounded.
It was not clear how many of the militants were killed.
"If these people can just enter a military base like this, then how can any Pakistani feel safe?" asked Mazhar Iqbal, 28, engineering company administrator taking a lunch break in the shade outside the complex where a crowd had gathered on a patch of grass to watch journalists set up camp as much as anything.
He said he was from an insecure area of the southern city already infamous as a source of funding for militant groups.
"The government and the army are just corrupt. We need new leaders with a vision for Pakistan."
Karachi has a population of about 18 million people, a volatile mix of rival ethnic groups and political factions, who all to readily resort to violence to settle scores.
Sprawling along the sun-baked coast of the Arabian Sea, the city is also home to Pakistan's main port, financial markets and the central bank.
It is also a transit point for military and other supplies to Afghanistan for the U.S.- and NATO-led anti-insurgency effort there.
QUESTIONS
The navy base is ringed with a concrete wall with about five feet of barbed wire on top. An aircraft, armed with rockets, ... (reuters)