QUES: One of the best known sporting events in the city is the Boston Marathon, the 26.2-mile (42.2 km) race which is the world's oldest annual marathon, run on Patriots' Day in April. On April 15, 2013, two explosions killed three people and injured hundreds at the marathon. Another major annual event is the Head of the Charles Regatta, held in October.

How many people were killed in the explosions at the Boston marathon?
What is the answer?
ANS: three
QUES: Federal law and treaties, so long as they are in accordance with the Constitution, preempt conflicting state and territorial laws in the 50 U.S. states and in the territories. However, the scope of federal preemption is limited because the scope of federal power is not universal. In the dual-sovereign system of American federalism (actually tripartite because of the presence of Indian reservations), states are the plenary sovereigns, each with their own constitution, while the federal sovereign possesses only the limited supreme authority enumerated in the Constitution. Indeed, states may grant their citizens broader rights than the federal Constitution as long as they do not infringe on any federal constitutional rights. Thus, most U.S. law (especially the actual "living law" of contract, tort, property, criminal, and family law experienced by the majority of citizens on a day-to-day basis) consists primarily of state law, which can and does vary greatly from one state to the next.

Does every state have the same laws?
What is the answer?
ANS: vary greatly from one state to the next.
QUES: While the Federal District was ruled by the federal government through an appointed governor, the municipalities within it were autonomous, and this duality of powers created tension between the municipalities and the federal government for more than a century. In 1903, Porfirio Díaz largely reduced the powers of the municipalities within the Federal District. Eventually, in December 1928, the federal government decided to abolish all the municipalities of the Federal District. In place of the municipalities, the Federal District was divided into one "Central Department" and 13 delegaciones (boroughs) administered directly by the government of the Federal District. The Central Department was integrated by the former municipalities of Mexico City, Tacuba, Tacubaya and Mixcoac.

When was the autonomy of the municipalities eliminated?
What is the answer?
ANS:
1928