Mexico City (/ˈmɛksɪkoʊˈsɪti/; Spanish: Ciudad de México American Spanish: [sjuˈðað ðe ˈmexiko], formerly known as México, D. F., or simply D. F.) is the federal district (distrito federal), capital of Mexico and seat of the federal powers of the union. is the capital of Mexico, and it is one of the 32 Mexican states. Mexico City is the country's largest city as well as its most important political, cultural, educational and financial center.
As an "alpha" global city Mexico City is one of the most important financial centers in North America. It is located in the Valley of Mexico (Valle de México), a large valley in the high plateaus at the center of Mexico, at an altitude of 2,240 metres (7,350 ft). The city consists of sixteen boroughs.
The crater was discovered by Antonio Camargo and Glen Penfield, geophysicists who had been looking for petroleum in the Yucatán during the late 1970s. Penfield was initially unable to obtain evidence that the geological feature was a crater, and gave up his search. Through contact with Alan Hildebrand, Penfield obtained samples that suggested it was an impact feature. Evidence for the impact origin of the crater includes shocked quartz, a gravity anomaly, and tektites in surrounding areas.
Prior to the presidency, Calderón received two master's degrees and went on to work within the PAN while it was still an important opposition party. Calderón served as National President of the party, Federal Deputy, and Secretary of Energy in Vicente Fox's cabinet.
He served in the cabinet of the previous administration up until he resigned to run for the Presidency and secured his party's nomination. The Federal Electoral Institute's official electoral results gave Felipe Calderón the largest vote total and the presidency but the decision was contested by Andrés Manuel López Obrador. Calderón's victory was confirmed on September 5, 2006 by the Federal Electoral Tribunal.