Yesterday morning, I flew from IAD to FLL (via Charlotte) and back again that night. I had one carry on bag and it did not get opened and searched at IAD or FLL. The only difference I noted (besides the armed marshalls at IAD and the usual questions now about carrying objects) was that at FLL, the security guard made me take my hat off after I passed throught the detector (it didn't go off)...just wanted to make sure I wasn't hiding anything under the hat.