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Workers Install Chimney Pipe on Sistine Chapel

Workers attached a chimney to the Sistine Chapel's roof Friday, as the Vatican prepares for cardinals to begin their deliberations on a papal successor.

As tradition dictates, the cardinals will use smoke signals to indicate whether a decision has been reached. The chimney will billow white smoke if they are successful - black smoke if they don't agree.

The smoke is produced by treating the cardinals' ballots with special color-producing chemicals and burning them.

Beginning Monday, 115 cardinals will go into seclusion, hold four votes each day and remain in the Vatican Palace until they have elected a successor to Pope John Paul II.

Some information for this report provided by AFP and AP.