From Talking Points Memo:
Jewish community centers in at least 11 states received bomb threats on Monday, echoing similar waves of threats on Jan. 9 and Jan. 18.
The threats came after hundreds of headstones were overturned at a Jewish cemetery in Philadelphia over the weekend. According to a report by WPVI, more than 500 headstones were damaged in what police called an act of vandalism, though they did not attribute a specific cause.