Sunday in Pictures: Campaigning in Iowa and More

See today's 10 best news photos.

Campaign volunteers listen as Democratic presidential candidate Sen. Bernie Sanders speaks during a campaign event at Five Sullivan Brothers Convention in Waterloo, Iowa. Alex Wong / Getty Images
A competitor emerges from the water during the Tough Guy Challenge at South Perton Farm in Telford, England. Dan Mullan / Getty Images
A migrant boy holds blankets as he disembarked from the passenger ferry Blue Star arriving from the Greek island of Lesbos at the port of Piraeus in Athens. ANGELOS TZORTZINIS / AFP - Getty Images
Israeli soldiers react as they secure the scene of a reported Palestinian shooting attack at a checkpoint near the Beit El settlement, close to West Bank city of Ramallah. A Palestinian opened fire at a checkpoint near the Jewish settlement in the West Bank, wounding three Israelis before being shot dead. ABBAS MOMANI / AFP - Getty Images
Mario Tama / Getty Images
Republican presidential candidate Jeb Bush speaks at a campaign event at his local field office in Hiawatha, Iowa. The Democratic and Republican Iowa Caucuses, the first step in nominating a presidential candidate from each party, will take place on February 1. Brendan Hoffman / Getty Images
U.S. Republican presidential candidate Donald Trump is mobbed by supporters after a campaign rally in Council Bluffs, Iowa. SCOTT MORGAN / Reuters
U.S. Democratic presidential candidate Hillary Clinton is greeted by a young girl as she arrives to speak at a campaign rally at Abraham Lincoln High School in Council Bluffs. BRIAN SNYDER / Reuters
Syrian security forces and residents gather at the site of suicide bombings in the area of a revered Shiite shrine in the town of Sayyida Zeinab, on the outskirts of the capital Damascus. LOUAI BESHARA / AFP - Getty Images
A car tows a snowboarder along the frozen surface of the Yenisei River in Taiga district, with the air temperature at about minus 13 degrees, outside Krasnoyarsk, Siberia, Russia. ILYA NAYMUSHIN / Reuters