U.S. Stocks are starting this 'Merger Monday' higher on possible deals and following cues from Europe. Major European markets rose after its central bank president's speech in Jackson Hole Friday. Mario Draghi said the ECB is prepared to take available steps necessary to stimulate Europe's economy. Burger King (BKW) may buy Canadian coffee and doughnut chain, Tim Hortons. The deal would be structured so the combined company would be based in Canada, which has a lower corporate tax rate. Intermune (ITMN) shares opened sharply higher after being acquired by Switzerland's Roche. This biotech deal is for more than $8 billion dollars in cash. Sony's (SNE) PlayStation Network is back online after a cyber attack forced a shut down over the weekend. Sony says no personal information was accessed. Separately, hackers tweeted on Sunday that there could a bomb inside a flight carrying a top Sony executive. That flight was diverted.