Photos of Day 7 From The London Olympics TweetShareGoogle+Email View Slideshow 1 of 7 U.S. hurlders Angelo Taylor (second from right) competes in the men's 400m hurdles. He finished first in the heat. Today marks the first day of track and field events. Gabriel Bouys / AFP/Getty Images View Slideshow 2 of 7 Missy Franklin celebrates winning the women's 200m backstroke final with team mate Elizabeth Beisel on Day 7 of the London 2012 Olympic Games. Beisel placed third in the event. Al Bello / Getty Images View Slideshow 3 of 7 Michael Phelps competes in the men's 100m butterfly final. Phelps surged from behind to win the event. Jorge Silva / Reuters /Landov View Slideshow 4 of 7 Karl Schulze, Phillipp Wende, Lauritz Schoof and Tim Grohmann of Germany celebrate winning gold in the men's quadruple sculls final. Ezra Shaw / Getty Images View Slideshow 5 of 7 Cuba's Idalys Ortiz (in white) tosses Japan's Mika Sugimoto during the women's 78kg judo contest match. Ortiz won the match. Toshifumi Kitamura / AFP/Getty Images View Slideshow 6 of 7 Sergei Martynov of Belarus competes in the men's 50m rifle prone shooting event. Martynov won the event. Sergio Moraes / Reuters /Landov View Slideshow 7 of 7 Roger Federer of Switzerland returns a shot in the third set against Juan Martin Del Potro of Argentina in the semifinal of men's singles tennis. Federer won the match, which took more than 4 hours to play. Clive Brunskill / Getty Images Originally published on August 8, 2012 6:02 pm Photo highlights from today's Olympic action include the start of track and field, swimmer Missy Franklin, and Roger Federer's four-hour battle in the men's tennis semifinals. Want to see yesterday's photos? Click here.Copyright 2013 NPR. To see more, visit http://www.npr.org/. TweetShareGoogle+EmailView the discussion thread.