Here's a brief look at some of the top news stories around the world for April 13, 2015. 

 Marco Rubio to announce campaign for president

Sen. Rubio, R-Fla., will make it official at an event tonight. He said today he can be the leader of a new "American century" if elected president.

[Read more from USA Today]

 Hillary Clinton is running, too; her logo has people buzzing

The most surprising thing about Hillary Clinton's presidential announcement on Sunday was her new logo, which has created a lot of chatter on social media.

[Read more from CNN]

 Milwaukee mayor calls driver's killing an 'assassination'

A Milwaukee man who accidentally hit a 2-year-old boy with his van was shot dead moments later as he tried to help the child. The toddler's 15-year-old brother was also shot and died later at a hospital.

[Read more from the Milwaukee Journal Sentinel]

Alan Turing's notebook fetches $1 million at auction

A scientific notebook compiled by World War II codebreaker Alan Turing sold for $1 million in an auction in New York. Turing's work was the subject of the 2014 film "The Imitation Game."

[Read more from the BBC]