New York City Mayor Bill de Blasio, second from left, and New York Police Department Commissioner Bill Bratton address the media on Monday about the officers shot over the weekend. (Andrew Burton/Getty)
A man, who gathered with dozens to show support for policemen two days after officers Wenjian Liu and Rafael Ramos were shot and killed as they sat in a marked squad car in Brooklyn on Saturday, embraces a New York Police Department (NYPD) officer outside the 50th Precinct Station House in Bronx borough of New York December 22, 2014. (ADREES LATIF / REUTERS)
A man prays on his knees at a makeshift memorial at the site where two police officers were fatally shot in the Brooklyn borough of New York December 22, 2014. (CARLO ALLEGRI / REUTERS)
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A woman holds images of slain New York Police Department (NYPD) officers Wenjian Liu and Rafael Ramos, who were shot and killed as they sat in a marked squad car in Brooklyn on Saturday, as she joined dozens of mourners who gathered to show their support for policemen outside the 50th Precinct Station House in Bronx borough of New York December 22, 2014. (ADREES LATIF / REUTERS)
A man holds a sign and the American flag as he gathers with dozens to show support for policemen, two days after New York Police Department (NYPD) officers Wenjian Liu and Rafael Ramos were shot and killed as they sat in a marked squad car in Brooklyn, outside the 50th Precinct Station House in Bronx borough of New York December 22, 2014. (ADREES LATIF / REUTERS)
School children, who gathered with dozens to show support for policemen two days after officers Wenjian Liu and Rafael Ramos were shot and killed, meet with New York Police Department (NYPD) officers outside the 50th Precinct Station House in Bronx borough of New York December 22, 2014. (ADREES LATIF / REUTERS)
A makeshift memorial at a prayer vigil in Brooklyn on Dec. 21 for two slain police officers. (Stephanie Keith/Reuters Photo)
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Police stand solemn vigil late at night at a makeshift memorial at the site where two police officers were shot in the head in the Brooklyn borough of New York, December 21, 2014. (CARLO ALLEGRI / REUTERS)
Police stand solemn vigil late at night at a makeshift memorial at the site where two police officers were shot in the head in the Brooklyn borough of New York, December 21, 2014. (CARLO ALLEGRI / REUTERS)
Mourners sing the gospel song “This Little Light of Mine,” during a prayer vigil at the site where two New York Police Department (NYPD) officers were fatally shot in the Brooklyn borough of New York December 21, 2014. (STEPHANIE KEITH / REUTERS)
Police officers pause at a memorial for two slain cops during a vigil in Brooklyn on Sunday, Dec. 21. (Justin Lane/EPA)
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A police officer lays flowers at a makeshift memorial at the scene were two police officers were shot dead in the Brooklyn borough of New York December 21, 2014. (STEPHANIE KEITH / REUTERS)
Police officers lay flowers at a makeshift memorial at the scene were two police officers were shot dead in the Brooklyn borough of New York December 21, 2014. (STEPHANIE KEITH / Reuters Photo)
A black mourning band is wrapped around a police officer’s badge as he stands outside the 84 precinct following the death of two police officers in Brooklyn, New York December 20, 2014. (CARLO ALLEGRI / Reuters Photo)
Police officers salute as vehicles containing the bodies of two New York Police officers who were shot dead drive by in the Brooklyn borough of New York December 20, 2014. (STEPHANIE KEITH / Reuters Photo)
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Police officers line the route as vehicles containing the bodies of the two New York Police officers who were shot dead drive by in the Brooklyn borough of New York, December 20, 2014. (STEPHANIE KEITH / Reuters Photo)
An ambulance carrying one of the two New York Police officers who were shot dead passes by a New York Fire Department honor guard along Broadway in the Brooklyn borough of New York, December 20, 2014. (CARLO ALLEGRI / Reuters Photo)
Police are pictured at the scene of a shooting where two New York Police officers were shot dead in the Brooklyn borough of New York, December 20, 2014. (CARLO ALLEGRI / Reuters Photo)
Newly sprayed graffiti are seen on a storefront on the Lower East Side in New York on December 20, 2014 condemns the killing of two police officers in the city earlier in the day. (SHAUN TANDON / AFP/Getty Images)
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The scene at a shooting where two New York City police officers were killed execution style Saturday afternoon as they sat in their marked police car on a Brooklyn street corner on December 20, 2014 in New York City. (Spencer Platt / Getty Images)
The scene at a shooting where two New York City police officers were killed execution style Saturday afternoon as they sat in their marked police car on a Brooklyn street corner. (Spencer Platt / Getty Images)
New York City Mayor Bill de Blasio (L) reacts as he speaks to the media during a news conference with New York City Police Department (NYPD) Commissioner Bill Bratton (R) after two NYPD officers were shot, in Brooklyn, New York. (John Taggart / EPA)
New York City Police Department (NYPD) Commissioner Bill Bratton (R) speaks to the media as New York City Mayor Bill de Blasio (2-R) listens during a news conference after two NYPD officers were shot, in Brooklyn, New York. (John Taggart / EPA)
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A police officer pauses as he listens to New York City Police Commissioner William J. Bratton and Mayor Bill de Blasio at a news conference at Woodhull Hospital following the killing of two New York City police officers. (Spencer Platt / Getty Images)
The scene at a shooting where two New York City police officers were killed execution style Saturday afternoon as they sat in their marked police car on a Brooklyn street corner. (Spencer Platt / Getty Images)
Police are seen on the scene at Tompkins and Myrtle avenues in Brooklyn where two New York City police officers were shot in New York, New York. (John Taggart / EPA)
Police are seen on the scene at Tompkins and Myrtle avenues in Brooklyn where two New York City police officers were shot in New York, New York. (John Taggart / EPA)
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Police block off the scene of a shooting where a gunman killed two New York police officers as they sat in their squad car before killing himself in New York. (Mariana Pena Cater / Reuters)
Police are seen on the scene at Tompkins and Myrtle avenues in Brooklyn where two New York City police officers were shot in New York, New York. (John Taggart / EPA)
Police are seen on the scene at Tompkins and Myrtle avenues in Brooklyn where two New York City police officers were shot in New York, New York. (John Taggart / Chicago Tribune)
