A look at the Mets' festivities for their home opener against the Phillies on Monday.

FIRST PITCH: Mets will honor the families of fallen NYPD heroes Wenjian Liu and Rafael Ramos, who were killed in the line of duty on Dec. 20 in Brooklyn. Detective Liu's widow, Pei Xia Chen, and Ramos' sons Jaden and Justin will throw out the ceremonial first pitch.

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NATIONAL ANTHEM: NYPD Officer Lauren Leggio

PREGAME: Members of the NYPD will participate in pregame ceremonies including singing the national anthem and "God Bless America." More than 150 NYPD officers will hold a giant American flag measuring 150 feet by 300 feet that will span the outfield grass. The NYPD has arranged for a special helicopter flyover of Citi Field.

VETERAN OF THE GAME: Former Mets Edgardo Alfonzo, John Franco, Rusty Staub and Mookie Wilson will present a game flag to the Veteran of the Game.

GOD BLESS AMERICA: NYPD Officer Makiah Brown

BE THERE EARLY: In anticipation of a standing-room-only crowd and enhanced security procedures, Mets encourage fans to take mass transit and arrive early. Gates open at 10:40 a.m. and pregame ceremony starts at 12:30 p.m.