NEW YORK ( TheStreet) -- U.S. stock futures were signaling a slighter weaker start for Wall Street ahead of emergency G-7 talks Tuesday over the eurozone debt crisis. European stocks were mixed, while Asian shares posted gains. Japan's Nikkei 225 index rose 1% to 8,382. The U.S. will discuss strengthening the European banking system with leaders from Japan, Germany, France, Britain, Italy and Canada. U.S. stocks struggled to eke out gains Monday after a larger-than-expected drop in factory orders. The Dow Jones Industrial Average on Monday declined 17 points, or 0.1%, to close at 12,101. The economic calendar in the U.S. Tuesday includes the Institute for Supply Management's services index for May at 10 a.m. EDT. The consensus estimate is for a reading of 53.1, according to Briefing.com, down from 53.5 in April. A reading above 50 indicates expansion. Exxon Mobil ( XOM) is considering exporting liquefied natural gas from the United States, according to reports. Asked whether Exxon planned to export LNG from the United States, CEO Rex Tillerson told Reuters: "We are studying it." Exxon is North America's largest natural gas producer. Natural gas prices in the U.S. are at their lowest in a decade. Google ( GOOG) will buy Silicon Valley startup Meebo. Meebo boasts 100 million monthly active users. "We are always looking for better ways to help users share content and connect with others across the Web, just as they do in real life,'' Google said in a statement. "With the Meebo team's expertise in social publisher tools, we believe they will be a great fit with the Google Plus team.'' Terms of the deal weren't disclosed, but reports last month put the price tag at about $100 million. Walt Disney ( DIS) plans to curb the advertising of junk-food on its television and radio programs aimed at children, The Wall Street Journal reported, citing a person familiar with the matter. Disney CEO Robert Iger is expected to make the announcement Tuesday with First Lady Michelle Obama.