The Justice Department says the arrest of two leaders of an Albany, New York, mosque should "give pause to anyone considering terrorist activity." The men have been arrested in an alleged plot to buy a shoulder-fired missile. Court papers allege that the men believed the weapon would be used to assassinate the Pakistani ambassador in New York. That's what they were allegedly told by a government informant. Deputy Attorney General James Comey says US agents and informants are "working very, very hard to infiltrate the enemy." Two US law enforcement officials, speaking anonymously, said the two men have ties to a group which has been linked to al-Qaida. But the court papers don't mention any such connection. If convicted, the men could face up to 70 years in prison and a 750-thousand-dollar fine.