Wall Street set to open lower after Brussels explosions

By Abhiram Nandakumar and Tanya Agrawal REUTERS - Wall Street looked set to open lower on Tuesday after explosions in Brussels sparked fresh geopolitical concerns and sent investors scurrying for safe-haven assets. At least 26 people were killed in twin attacks on Brussels airport and a rush-hour metro train in the Belgian capital, triggering security alerts across western Europe. European markets fell, while traditional safe havens gold and government bonds firmed up as reports of the events in