The Latest: Cleveland transforms for RNC after France attack
Drivers headed into downtown are seeing signs urging people to call an FBI tip line if they see anything suspicious.
U.S. Secret Service officials say security planning for the Republican and Democratic national conventions took into account large-scale terrorism threats like the vehicle attack that occurred in France.
Philadelphia police will use rolling street closures and uniformed officers to protect areas outside the security zone where large protests and rallies are planned.