NYPD OFFICERS SHOT

NEW YORK — The two New York City police officers who were ambushed and shot to death in their vehicle were "quite simply, assassinated," and the suspect had made Instagram posts that were very anti-police, the police commissioner says. 

US-CUBA-NEXT GENERATION

HAVANA — For a generation that grew up believing the best way to pursue their dreams was to leave the island, the announcement this week that Cuba will open relations with the United States is prompting many to reevaluate their futures. 

NUCLEAR MISSTEPS

WASHINGTON — Faced with one of its biggest challenges in years — repairing a troubled nuclear missile corps — the U.S. Air Force has taken an important first step by admitting, after years of denial, that its problems run deep and wide.