A Mexican soldier carries a concrete block from inside the premises of the building that houses state-owned Mexican oil giant Pemex following a blast on the eve, in Mexico City on February 01, 2013. An explosion rocked the skyscraper, leaving up to 32 dead and 121 injured. Hundreds of firefighters, police and soldiers toiled through the night after the blast ripped through an annex of the 54-floor tower leaving concrete, computers and office furniture strewn on the ground. TOPSHOTS/AFP PHOTO/Alredo Estrella