Tunisia#039;s president has vowed to fight terrorists quot;without mercyquot;, following a gun attack on the Bardo Museum in the capital Tunis that killed 19 people. Seventeen tourists were killed in the attack, including visitors from Japan, Italy, Colombia, Australia, France, Poland and Spain, officials said. Two Tunisians, one a police officer, were also killed in Wednesday#039;s attack. Security forces have killed two gunmen but are continuing the search for accomplices. Officials say that more than 40 people, including tourists and Tunisians, were injured. 'Democracy will win' President Beji Caid Essebsi said the country was quot;in a war with...