The NYPD is tracing the steps of a gunman who killed two of
its officers back to Baltimore, where he shot his ex-girlfriend
earlier in the day. Police say the killer may have acted out of
vengeance over recent deaths of black men during encounters with
police; and, for a century, people have told the tale of a yuletide
ceasefire soccer game in the middle of World War I. German and
British soldiers briefly stopped shooting at each other, met and
mingled in the no-man's land between their lines.