There is visible evidence that foreign personnel are surreptitiously slithering into Pakistan. There have been news of US marines having landed in Pakistan for training Pak troops. Whoever has allowed this is playing with fire. I would like to remind our top leadership of the story about the camel and the Arab and his tent. -LT COL (Retd) AIZAZ HAIDER, Lahore, via e-mail, August 28.