BERLIN (Reuters) - Three suspected Islamist militants who were planning to attack American targets in Germany had orders to act by Sept. 15 and knew police were hot on their trail before their arrest, a magazine said on Saturday. The plan was foiled on Tuesday when police arrested two German converts to Islam and a Turk in the biggest German police investigation in the last 30 years. According to surveillance details published in Der Spiegel magazine, the men had been given a two-week deadline for their planned strikes in a late August call from northern Pakistan that was monitored by...