 Complete the following phrase:  In the 2010 and 2011 seasons his form wavered and his best run of this period was 13.35 seconds in Padua. He had a resurgence in 2012, starting with a 60-meter hurdles time of 7.40 seconds at the USA Indoor Track and Field Championships. This was a world leading time which moved him into the all-time top twelve on the global lists. However, he again faltered in the national championships and failed to qualify for the IAAF World Indoor Championships. Outdoors, he managed to match his personal record with a time of 13.13 seconds to win at the Golden Spike Ostrava meet. He reached the final at the 