The families of two slain New York City police officers threw out the ceremonial first pitch at the Mets' home opener at Citi Field, while the widow of American Sniper Chris Kyle pitched in for the San Diego Padres. New England Patriots quarterback Tom Brady also threw a first pitch, at Fenway Park in Boston - but didn't do himself proud, chucking the ball straight at the ground. The NYPD families were joined by Mayor Bill de Blasio at a time when his relationship with the police department is again coming under scrutiny. Scroll down for video New York Mayor Bill de Blasio waves as he stands with members of the families of New York City Police Detectives Wenjian Liu and Rafael Ramos before they threw out the ceremonial first pitch at the Mets home opener baseball game against the Philadelphia Phillies in New YorkRafael Ramos and Wenjian Liu were murdered on patrol in DecemberTheir families threw out the ceremonial first pitch at the Mets' home openerThey were joined by Mayor De Blasio, who was booed when introducedTom Brady and 'American Sniper' widow Tara Kyle also threw first pitches
Police officers hold a giant _ flag before the baseball game between the New York Mets and the Philadelphia Phillies. Tribute: _ helicopters fly over Citi Field on Monday.