Stock futures imply modest gains, Wall Street on track for strong week

By Ryan Vlastelica NEW YORK (Reuters) – U.S. stock index futures pointed to a slightly higher open on Friday, with major indexes on track for a week of strong gains, though geopolitical concerns remained in view as the tenuous situation in Ukraine continued. The biggest East-West confrontation since the Cold War ramped up after U.S. President Barack Obama targeted some of Russian President Vladimir Putin's closest long-time political and business allies in response to Russia's seizure of Crimea from Ukraine. Russia retaliated with sanctions of its own against top U.S. politicians.