With rumors swirling of a possible link to the al-Qaida terrorist network, the FBI insisted Monday that investigators still don't know why Hesham Mohamed Hadayet went on an Independence Day shooting rampage at LAX. ONLINE EXTRA Recent stories on the shooting at LAX:• Outpouring of grief for 2 shot to death in LAX attack• Arab-Americans fear backlash• Jewish leaders urge calm• Airport security to be boosted• Victims mourned across Valley• LAX shooter full of anger• Local man slain, father of eight• El Al security tops in industry• 3 dead at LAX IN MEMORY Memorial funds have been created to...