You have to think about where you're standing, you have to think about where you have cover, the type of obstacles you can place between you and potential gunmen.
The Mueller-Stewart study looked at several potential threats, including a gunman, a suitcase bomb, a truck bomb and a bomb strapped to a person.
French Prime Minister Manuel Valls announced the measure as troops search for potential accomplices of the gunman who shot dead four Jews in a kosher supermarket as customers stocked up on goods ahead of Shabbat, the Jewish day of rest.
But Abbott emphasized that he had no information to indicate that the gunman had any potential co-conspirators.
For weeks, he had been certain that his name was on a list of potential targets for right-wing gunmen.
According to police, Kasab told them that the main planner arrived in Mumbai a month ago to film potential targets to help train the gunmen.
Authorities have held back details about the officer's shooting death because they don't want to compromise a potential prosecution by providing information only the gunman or a witness would know, Filenko said.
Critics of the Jefferson County authorities have argued that Mr. Harris and Dylan Klebold, the other Columbine gunman, gave ample warning of their potential for violence, and that the April 1999 killings could have been prevented.
Texas Gov. Greg Abbott, the state's former attorney general, said that while there was only one gunman, he would not rule out potential accomplices.
Occasional bursts of gunfire could be heard in the distance from the center of Donetsk, where residents said they were now living in fear of a potential battle between government forces and the separatist gunmen now out in force.
