From the Washington Post:
An Arlington man has been arrested after posting on Facebook that he could put pipe bombs on Metro cars or in Georgetown at rush hour, according to a criminal complaint filed in U.S. District Court in Alexandria.
Court papers do not show that Awais Younis, 25, also known as Mohhanme Khan and Sundullah Ghilzai, ever acted on the threats. He has been charged with communicating threats via interstate communications.
In late November, someone told FBI agents in New Orleans that a person they had met via Facebook had chatted about using explosives in the D.C. area, court papers say. The person, known as Sundullah Ghilzai, described how to build a pipe bomb and indicated what type of shrapnel would cause the most damage.
Ghilzai said he could put a pipe bomb under a sewer head in Georgetown at rush hour to cause the greatest number of casualties, according to an affidavit filed in court by the FBI. He also talked about putting bombs on the third and fifth Metro cars, which he said held the largest number of passengers.
I suspect the third and fifth cars could turn up empty on the Metro tonight.