15. Flower from slide 2 is 041210_mikebaird_flickr.com Trees from slide 3 is 041210_ben_flickr.com Raiders flags on slide 4 is from 041210_KTeezy_flickr.com Laptop 041910_yugenro_flickr.com Horse 041910_Thowrauk_flickr.com Basketball 041910_Ryanfung_flickr.com Hamburger 041910_avlxyz_flickr.com