News at Seven-Thirty highlights:Thailand has descended into further chaos; HK government has issued a travel warning urging local residents not to go to Bangkok; American cargo ship captain being held captive by pirates has been rescued by U.S. Navy Seals; 4 people were rescued by a French commando raid on a pirate-controlled yacht in the Indian Ocean; Moldova’s constitutional court has ordered a recount of ballots from parliamentary election; a volcano has come alive in the Galapahos Islands; converted advertising vehicles are illegal in Hong Kong; a two-year-old child was in serious condition after drinking kerosene; Hong Kong Convention and Exhibition Centre's expansion project has been completed; experts say more research should be done to further enhance marine conservation.