Cambridge

Hundreds of tourists stand on a viewing platform to watch the sunrise in Uluru, Australia, Tuesday, April 22, 2014. The Duke and Duchess of Cambridge will visit Uluru Tuesday during their three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George. (AP Photo/Rob Griffith)

Rob Griffith/AP

Tourists watch the sunrise in Uluru, Australia. The Duke and Duchess of Cambridge visited Uluru on Tuesday during their three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George. Read more

WATERTOWN, MA - APRIL 19:  Police with guns drawn search for a suspect on April 19, 2013 in Watertown, Massachusetts. Earlier, a Massachusetts Institute of Technology campus police officer was shot and killed late Thursday night at the school's campus in Cambridge. A short time later, police reported exchanging gunfire with alleged carjackers in Watertown, a city near Cambridge. It's not clear whether the shootings are related or whether either are related to the Boston Marathon bombing.

Mario Tama/Getty

Police with guns drawn on Friday search for a suspect in Watertown, Massachusetts. A Massachusetts Institute of Technology campus police officer was shot and killed late on Thursday night at the school’s campus in Cambridge. A short time later, police reported exchanging gunfire with alleged carjackers in Watertown, a city near Cambridge. Read more