In today's "What to Watch on Wall Street" segment for Friday, August 29th 2014, we take a sneak peek at the financial markets and geopolitical developments that could weigh on market sentiment. NATO and Ukraine will hold an emergency meeting on Friday to discuss the situation in Ukraine. On the earnings front, we're covering discount retailer Big Lots, Inc. (BIG). Also, the U.S. economic report numbers for personal income and consumer spending are both expected to be out Friday morning. For the latest financial news and updates from Wall Street, check back here on TheStreet.com throughout the day.