求翻译：　　这一切都得追溯到2009年，小红门乡人民政府于本年4月9日开始公开拆迁，在强拆过程中，闫书亮的妻子已怀孕数月，他们只穿了一身内衣就被赶了出来，后来他们无处栖身，就在被拆迁的房子的原址上搭了个窝棚，但很快被赶来的气势汹汹的乡政府人员给掀翻了。是什么意思？

All this had to be traced back to 2009, Xiaohongmen township people's government at the beginning of this year April 9 public demolition, during the demolitions, Yan Liang's wife has written a few months pregnant, who was wearing only an underwear driven out, then they are homeless, on the site of t