Shootings

Numerous law enforcement vehicles and SWAT teams respond to shooter Wednesday, March 22, 2017, at an apartment complex in Rothschild, Wis. The shootings happened at a bank, a law firm and an apartment complex, where officers, including a SWAT team, were in a standoff with the suspect late in the afternoon, Wausau police Capt. Todd Baeten said at a news conference. The area is about 90 miles west of Green Bay. (T'xer Zhon Kha /The Post-Crescent via AP)

Numerous law enforcement vehicles and SWAT teams respond to shooter Wednesday, March 22, 2017, at an apartment complex in Rothschild, Wis. The shootings happened at a bank, a law firm and an apartment complex, where officers, including a SWAT team, were in a standoff with the suspect late in the afternoon, Wausau police Capt. Todd Baeten said at a news conference. The area is about 90 miles west of Green Bay. (T'xer Zhon Kha /The Post-Crescent via AP)

Police forensic officers work in Parliament Square outside the Houses of Parliament in London, Thursday March 23, 2017. On Wednesday a knife-wielding man went on a deadly rampage, first driving a car into pedestrians then stabbing a police officer to death before being fatally shot by police within Parliament's grounds in London. (AP Photo/Kirsty Wigglesworth)

Police work at Westminster Bridge with the Houses of Parliament in background, in London, Thursday March 23, 2017. On Wednesday a knife-wielding man went on a deadly rampage, first driving a car into pedestrians on Westminster Bridge then stabbing a police officer to death before being fatally shot by police within Parliament's grounds in London. (AP Photo/Tim Ireland)

In this image taken from video, members of Britain's House of Parliament observe a minute of silence paying respect to the victims of yesterday's attack in London, Thursday March 23, 2017. On Wednesday a man went on a deadly rampage, first driving a car into pedestrians then stabbing a police officer to death before being fatally shot by police within Parliament's grounds in London.(PA via AP)

The flag flies at half staff above The House of Lords following Wednesday's attack in London, Thursday March 23, 2017. On Wednesday a knife-wielding man went on a deadly rampage, first driving a car into pedestrians before stabbing a police officer to death and then was fatally shot by police within Parliament's grounds in London. Five people were killed, including the assailant.(AP Photo/Kirsty Wigglesworth)

Numerous law enforcement vehicles and SWAT teams respond to shooter Wednesday, March 22, 2017, at an apartment complex in Rothschild, Wis. The shootings happened at a bank, a law firm and an apartment complex, where officers, including a SWAT team, were in a standoff with the suspect late in the afternoon, Wausau police Capt. Todd Baeten said at a news conference. The area is about 90 miles west of Green Bay. (T'xer Zhon Kha /The Post-Crescent via AP)

This undated booking photo provided by the Maricopa County Sheriff shows Wendy Lavarnia. Phoenix police say Lavarnia and her husband have been arrested following the shooting of their 9-year-old son, who police say remains on life support. Lavarnia told police she placed a loaded gun on a bed within reach of two of her young children while she turned to get a holster and that a 2-year-old shot the 9-year-old. She was arrested on suspicion of four counts of child abuse for allegedly endangering her children. (Maricopa County Sheriff via AP)

Conservative MP Tobias Ellwood, left, stands amongst the emergency services at the scene outside the Palace of Westminster, London, Wednesday, March 22, 2017. London police say they are treating a gun and knife incident at Britain's Parliament "as a terrorist incident until we know otherwise." The Metropolitan Police says in a statement that the incident is ongoing. It is urging people to stay away from the area. Officials say a man with a knife attacked a police officer at Parliament and was shot by officers. Nearby, witnesses say a vehicle struck several people on the Westminster Bridge. (Stefan Rousseau/PA via AP).