AUGUSTA, Maine - The deadline has arrived for Mainers to cast their ballot about which flag should honor their state's bicentennial.The state is looking at three designs for a flag to commemorate the 200th anniversary of Pine Tree State statehood. Maine Secretary of State Matthew Dunlap says online voting about the designs will end on Friday at 5 p.m.Dunlap will make a final decision about the flag, and submit it to the Maine Legislature and the Maine Bicentennial Commission. The results of the vote will play a major role in Dunlap's decision.