At today's Inauguration the local TV news has a list of what is banned. In keeping with the war riding atop terrorism certain items are of course BANNED. These items of contraband will be confiscated as per order of homeland security.
Signs, printed words etc. Hot coffee thermos bottles of any type. Certain food items. Baby strollers of any type. small folding chairs. Umbrellas large or small. -a dozen more common items...and at the end of the list weapons.