Catholics pray near windows covered partially with cement blocks inside St. Teresa of Avila church in Monterrey, Mexico, on Feb. 17, 2013.

A green light indicates there is no danger as a priest distributes Holy Communion to the congregation inside the church.

A concrete wall has been built in front of St. Teresa of Avila church.

Soldiers patrol under the Eiffel Tower on Jan. 14 in Paris. Islamist forces based in northern Mali vowed Monday to avenge France's fierce military offensive against them on French soil.

French army soldiers patrol Gare du Nord station in Paris on Jan. 14. France has ordered tightened security in public buildings and transport following action against radical Islamists both in Mali and Somalia.

A worker inspects armored vests designed for children at the Miguel Caballero factory on the outskirts of Bogota, Colombia, Thursday, Jan. 3, 2013.

Miguel Caballero, president of Miguel Caballero Company, uses a .38-caliber revolver to demonstrate the bulletproof quality of a leather jacket made at his factory.

Students and a teacher try to stop a mock attacker during a security drill at a primary school in Jinan, in eastern China's Shandong province on Dec. 18, 2012.

A guard tries to stop a mock attacker during a drill at a primary school in Jinan on Dec. 18, 2012.

Female Afghan National Police (ANP) officers aim their weapons during a drill at a training center near the German Bundeswehr army camp Marmal in Mazar-e-Sharif, northern Afghanistan on Dec. 11.

A female ANP officer receives her weapon for a drill at a training center near the German Bundeswehr army camp Marmal in Mazar-e-Sharif, northern Afghanistan on Dec. 11.

A German police instructor talks to female ANP officers before a drill at a training center near the German Bundeswehr army camp Marmal in Mazar-e-Sharif, northern Afghanistan on Dec. 11.

Male and female ANP officers line up before a drill at a training center near the German Bundeswehr army camp Marmal in Mazar-e-Sharif, northern Afghanistan on Dec. 11.

Male and female ANP officers take part in a drill at a training center near the German Bundeswehr army camp Marmal in Mazar-e-Sharif, northern Afghanistan on Dec. 11.

United States Coast Guard BM1 Christopher Valdes drives the 7.9-meter small boat alongside the United States Coast Guard Cutter William Flores on Oct.17 just off the shore of Miami Beach, Fla.

United States Coast Guard Executive Officer Catherine Gillen takes the conning in the bridge of the United States Coast Guard Cutter William Flores on Oct. 17 just off the shore of Miami Beach, Fla. The cutter is the third of a planned 58 Fast Response Cutters in the Sentinel Class as the U.S. Coast Guard continues to replace its aging fleet. On Nov. 3, the USCGC William Flores will be commissioned into service in Tampa, Florida.

A container ship moves past the new United States Coast Guard Cutter William Flores on Oct. 17 just off the shore of Miami Beach, Fla.

The 26-foot small boat moves past the new United States Coast Guard Cutter William Flores after it was launched from the launch ramp on the back of the ship on Oct. 17 just off the shore of Miami Beach, Florida.

United States Coast Guard BM1 Christopher Valdes, left, and MK2 Cristobal Lopez ride in the 26-foot small boat after exiting from the back launch ramp of the United States Coast Guard Cutter William Flores on Oct. 17 just off the shore of Miami Beach, Fla.

An Army Rapier missile defense battery is deployed at Blackheath insight of the Canary Wharf financial center on May 2, in London, England. The missiles are being readied as part of Operation Exercise Olympic Guardian which is taking place in London over the next few days to test security for the London 2012 Olympics.

Chinook Helicopters fly over the Olympic Stadium in London on May 2. London launched a major military exercise Wednesday to check security responses for the 2012 Olympics, as the final wave of test sports events got under way.

RAF ground technicians work on a RAF Typhoon fighter aircraft at RAF base Northolt, where four of the aircraft will be based as part of the Olympics related security exercise in west London, Wednesday, May 2. The Typhoon interceptor aircraft forms a part of a co-ordinated defense against possible threats to the London 2012 Olympic games, involving all three of the British armed services, with high end weaponry including a missile defence system, fighter aircraft and AWACS aircraft.

Ukrainian border guards take part in a master class in the Borispol airport near Kiev on Friday. Hairdressers and make-up artists conducted master classes for Ukrainian border guards who will meet tourists at Ukraine's main air hub during the Euro 2012 football championship.

A Ukrainian border guard takes part in a master class in the Borispol airport near Kiev.

Ukrainian border guards chat as they take part in a master class in the Borispol airport.

Ukrainian border guard working at the Borispol airport near Kiev.

Ukrainian border guards and a sniffer dog are seen in the Borispol airport near Kiev.

Security guards take part in an event at the presidential office Cheong Wa Dae in Seoul, South Korea, Feb. 27 to demonstrate their skills on how to deal with terrorism and other emergencies as part of their preparations for the upcoming Nuclear Security Summit. Top leaders from more than 50 nations and international organizations are expected to attend the summit, set for March 26 - 27 in Seoul.

A South Korean presidential body guard shoots a net at a "terrorist" during an anti-terror drill at the president's residence on Feb. 27, showcasing security preparations for an upcoming nuclear summit in Seoul.

A female presidential body guard shows her martial art skills during an anti-terror drill at the president's residence on Feb. 27, showcasing security preparations for an upcoming nuclear summit in Seoul. South Korea vowed tight security to guard world leaders against attacks by protesters and terrorists.

Chinese police officers stand next to their vehicles as they stand watch near a Tibetan village inside the Jiuzhai Valley National Park in Jiuzhaigou, in northwestern China's Sichuan province, on Feb. 8, 2012.

Tibetans sit on a motor cart outside a monastery after attending a religious ceremony at a monastery in Jiuzhaigou, Sichuan province, China, on Feb. 7, 2012.