The supreme court in 1993 upheld the right of the government to intercept and return refugees to

to their homeland without asylum hearings.

The Refugees in this case were from Haiti. This decision can be considered to be in contrast to the United NAtions treaty on refugees whereby Countries are obliged to refrain from forcibly returning people to territories where their lives might be endangered

to protect the united states' role as a world leader, president truman wanted to prevent the soviet union from spreading communism beyond its post-world war ii boundaries. he declared that the united states must assist any nations struggling to prevent a communist takeover.

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories