300 sketchbook update

Five new pages for the "300 heads" sketchbook:

The three richest people in the world: Bill Gates, Warren Buffet, Larry Ellison

The three tenors: Placido Domingo, Luciano Pavarotti, Jose Carreras

Soldiers: Staff Sgt. Salvatore Giunta, Specialist Pat Tillman, Sgt. 1st class Leroy Petry

Eric Clapton, George Harrison, Pattie Boyd

Malala Yousafari, Neda Agha-Soltan, and Marie Colvin

More will come soon.