Gold climbs back above $5,100 during the Asian session on Wednesday, moving away from an over one-week low, touched the previous day. Sustained safe-haven flow, amid escalating geopolitical tensions in the Middle East, acts as a tailwind for the bullion. However, a bullish US Dollar and reduced bets for more aggressive easing by the US Fed might keep a lid on the non-yielding yellow metal ahead of the US ADP report and ISM Services PMI later today.