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There_EX are_VBR many_DA2 reasons_NN2 why_RRQ America_NP1 is_VBZ a_AT1 superpower_NN1 ._. 
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Some_DD have_VH0 called_VVN it_PPH1 the_AT only_JJ remaining_JJ superpower_NN1 ._. 
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Still_RR others_NN2 have_VH0 called_VVN it_PPH1 a_AT1 hyperpower_NN1 ._. 
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How_RRQ has_VHZ this_DD1 happened_VVN ?_? 
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Why_RRQ did_VDD it_PPH1 happen_VVI ?_? 
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There_EX have_VH0 been_VBN no_AT international_JJ wars_NN2 on_II American_JJ soil_NN1 since_CS the_AT 1860_MC 's_GE ._. 
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America_NP1 lives_VVZ peacefully_RR with_IW its_APPGE two_MC adjoining_JJ neighbors_NN2 ,_, Canada_NP1 and_CC Mexico_NP1 ._. 
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There_EX is_VBZ nearly_RR a_AT1 4_MC ,_, 200_MC kilo_NNU1 meter_NN1 unprotected_JJ border_NN1 to_II the_AT north_ND1 ,_, and_CC except_II21 for_II22 tensions_NN2 over_II illegal_JJ Mexican_JJ immigration_NN1 across_II its_APPGE southern_JJ border_NN1 ,_, there_EX are_VBR generally_RR friendly_JJ relations_NN2 with_IW Mexico_NP1 ._. 
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Over_II the_AT last_MD several_DA2 decades_NNT2 ,_, American_JJ economic_JJ progress_NN1 was_VBDZ more_RGR often_RR positive_JJ than_CSN negative_JJ ._. 
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The_AT US_NP1 '_GE democratic_JJ ideals_NN2 and_CC freedoms_NN2 have_VH0 played_VVN a_AT1 big_JJ part_NN1 in_II its_APPGE dominance_NN1 in_II the_AT world_NN1 ._. 
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The_AT federal_JJ system_NN1 of_IO checks_NN2 and_CC balances_VVZ between_II the_AT executive_NN1 ,_, legislature_NN1 ,_, and_CC judicial_JJ branches_NN2 is_VBZ a_AT1 part_NN1 of_IO these_DD2 democratic_JJ ideals_NN2 and_CC freedoms_NN2 ._. 
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America_NP1 has_VHZ faced_VVN major_JJ difficulties_NN2 at_II home_NN1 and_CC abroad_RL and_CC most_RGT often_RR has_VHZ met_VVN these_DD2 challenges_NN2 fairly_RR successfully_RR ._. 
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The_AT Soviet_JJ Union_NN1 's_GE effort_NN1 to_TO keep_VVI up_RP with_IW the_AT US_NP1 in_II31 terms_II32 of_II33 nuclear_JJ and_CC conventional_JJ military_JJ strength_NN1 while_CS at_II the_AT same_DA time_NNT1 providing_VVG for_IF its_APPGE own_DA citizens_NN2 caused_VVD its_APPGE collapse_NN1 as_II the_AT only_JJ former_DA superpower_NN1 with_IW the_AT US_NP1 ._. 
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At_II the_AT same_DA time_NNT1 ,_, we_PPIS2 must_VM acknowledge_VVI that_DD1 American_JJ interests_NN2 internationally_RR have_VH0 often_RR conflicted_VVN with_IW those_DD2 of_IO other_JJ countries_NN2 ,_, sometimes_RT with_IW its_APPGE own_DA closest_JJT allies_NN2 ._. 
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The_AT US_NP1 has_VHZ overwhelming_JJ military_JJ strength._NNU ,_, military_JJ buildups_NN2 ,_, and_CC its_APPGE contributions_NN2 to_II the_AT successful_JJ conclusion_NN1 of_IO some_DD international_JJ conflict_NN1 ._. 
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are_VBR acknowledged_VVN ._. 
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Over_II the_AT last_MD several_DA2 years_NNT2 ,_, this_DD1 power_NN1 has_VHZ been_VBN utilized_VVN in_II a_AT1 sometimes_RT highly_RR arrogant_JJ fashion_NN1 that_CST led_VVD both_RR enemies_NN2 and_CC friends_NN2 to_TO feel_VVI that_CST the_AT terrorist_JJ attacks_NN2 in_II the_AT early_JJ twenty-first_MD century_NNT1 against_II the_AT United_NP1 States_NP1 were_VBDR terrible_JJ but_CCB perhaps_RR justified_VVN ._. 
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An_AT1 interesting_JJ question_NN1 arises_VVZ :_: will_VM the_AT US_NP1 be_VBI a_AT1 strategic_JJ rival_NN1 or_CC partner_NN1 with_IW other_JJ former_DA superpowers_NN2 such_II21 as_II22 the_AT current_JJ Russia_NP1 ,_, or_CC with_IW the_AT emerging_JJ strength_NN1 of_IO China_NP1 ?_? 
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<s>
Hopefully_RR ,_, America_NP1 and_CC China_NP1 ,_, as_II31 well_II32 as_II33 America_NP1 and_CC Russia_NP1 ,_, will_VM be_VBI friendly_JJ allies_NN2 and_CC partners_NN2 for_IF the_AT long_JJ term_NN1 instead_II21 of_II22 strategic_JJ competitors_NN2 ._. 
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In_II the_AT next_MD several_DA2 years_NNT2 ,_, will_VM China_NP1 join_VVI the_AT US_NP1 as_II a_AT1 major_JJ superpower_NN1 ?_? 
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And_CC if_CS so_RR ,_, will_VM they_PPHS2 both_RR continue_VVI to_TO live_VVI in_II peace_NN1 and_CC harmony_NN1 ?_? 
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<s>
Ideally_RR ,_, the_AT answer_NN1 must_VM be_VBI yes_UH at_RR21 least_RR22 to_II the_AT latter_DA question_NN1 ._. 
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