Russian President Vladimir Putin on Monday ordered officials in St. Petersburg to speed up construction of a trouble-plagued stadium which is scheduled to host 2018 World Cup games, including a semifinal. In a decree published Monday on the Kremlin's website, Putin said the stadium - provisionally named Zenit Arena - and other infrastructure must be built on time. The decree said Putin instructed officials to ''adopt comprehensive measures to eliminate the gaps'' in the stadium's construction schedule. More...